11115( 5) - 08/28/07 14:28 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11115 Version: 5 Check-in Time: 28-Aug-2007 18:27:32 STScI Edit Number: 2 Title Photometric Imaging of Asteroid 2 Pallas ------------------------------------------------------------------------------------ Type Cycle Parallel Pointing Tolerance GO 16 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Christopher T. Russell University of California - Los Angeles CoI: Ms. Britney E. Schmidt University of California - Los Angeles N CoI: Dr. James M. Bauer Jet Propulsion Laboratory N CoI: Dr. Lucy-Ann McFadden University of Maryland N CoI: Dr. Jian-Yang Li University of Maryland N CoI: Dr. Andrew S. Rivkin The Johns Hopkins University Applied N Physics Laboratory CoI: Dr. Joel W. Parker Southwest Research Institute N CoI: Dr. Peter C. Thomas Cornell University N CoI: Dr. S. Alan Stern Southwest Research Institute N ------------------------------------------------------------------------------------ Abstract We propose to conduct the first HST imaging of Asteroid 2 Pallas with WFPC2-PC over 4 HST orbits. We will image the asteroid in five filters: F336w, F439w, F555w, F675w and F814w. We will utilize these observations to drastically improve the knowledge of Pallas' shape, spin pole position and surface properties, including roughness and albedo, parameters that are poorly determined by previous study. These observations will result in high signal-to-noise, high resolution surface maps from the visible to the UV. A satellite search will also be conducted for objects within the stability field of up to 21st magnitude, or about 900m in diameter. It is demonstrated in our proposal that significant scientific opportunity exists in Cycle 16 because Pallas is at both a low-phase, 3.9 degree opposition and near its closest approach to Earth, conditions that do not occur simultaneously in the next twenty years. This window represents the best chance to answer long standing, fundamental questions about Pallas, the main asteroid belt, and the formation of the solar system. ------------------------------------------------------------------------------------ 11115( 5) - 08/28/07 14:28 - [ 2] Observations Description ------------------------ We will use the WFPC2 Planetary Camera (PC1) to observe 2 Pallas in five broad band filters--F439W (B), F555W (V), F675W (R), F814W (I), and F336W (UV)-- through four orbits, over most of a single rotation period of 7.1832 hrs (JPL Horizons). PC1's pixel scale gives 6-7 resolution elements across Pallas' diameter, allowing for spatially-resolved images. We will acquire approximately global longitudinal coverage for surface mapping. Shape models will be produced using representative images from each perspective. Pole determination will follow from shape models and tracking the motion of surface features through Pallas' rotation. Filters were selected for their diagnostic capabilities with respect to mineralogy and hydration, primarily to sample the full range of Pallas' spectrum available to us with WFPC2. The B, V, R and I filters cover the visible portion of Pallas' spectrum. The UV filter is in Pallas' UV spectral drop off , and so provides us with an opportunity to constrain Pallas' spectral behavior in this previously unexplored region. Pallas' surface will be mapped in each filter to determine the nature and the spatial behavior of the asteroid's mineralogy and albedo. Longer exposures in the V band and coadded frames will be used to search for satellites up to 21st magnitude (R~900m). We seek to observe Pallas during opposition on September 4. At this time, Pallas reaches a minimum phase angle of 3.98 degrees. Pallas is also at an angular diameter 0.326 arcseconds, the maximum for this opposition. From September 1-9, the asteroid is visible at phase angles below 4.5 degrees. Before August 9 and after September 30, the phase increases to 10 degrees, resulting in the loss of half a resolution element across the asteroid's surface. This comprimises both the spatial resolution of our images and the accuracy of the shape models. Ideally, we will be scheduled on or just after September 4. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 11115( 5) - 08/28/07 14:28 - [ 3] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 | TARGET NAME: PALLAS ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: ASTEROID 2 Pallas, B-type asteroid ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | TYPE=ASTEROID,A=2.77166846462974,E=0.230 | 75882817256,I=34.841828581513,O=173.1918 | 04366333,W=310.3448192659582,M=199.72616 | ,EPOCH=10-Apr-2007,EQUINOX=J2000 | | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | V = 8.83+/-0.1 | | ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 2 | TARGET NAME: PALLAS-COPY ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: ASTEROID 2 Pallas, B-type asteroid ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | TYPE=ASTEROID,A=2.77166846462974,E=0.230 | 75882817256,I=34.841828581513,O=173.1358 | 033133696,W=310.3448192659582,M=199.7261 | 6,EPOCH=10-Apr-2007,EQUINOX=J2000 | | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | V = 8.83+/-0.1 | | ------------------------------------------------------------------------------------------------------------------------------------ 11115( 5) - 08/28/07 14:28 - [ 4] Visit: 01 Visit Priority: Visit Requirements: BETWEEN 01-SEP-2007:00:00:00 AND 09-SEP-2007:00:00:00 On Hold Comments: Additional Comments: It is important that this visit be scheduled as close to the opposition of Pallas as possible in order to illuminate the greatest fraction of the asteroid as well as provide the best spatial resolution. Pallas is at minimum phase 3.98 on 2007-Sep-04 00:00 UT. Pallas is below 4.5 degrees from Aug 29-Sept 9, however, its largest angular size of 0.326 arcseconds occurs from Sept 4-9. Ideally, we will be scheduled on or just after Sept 4. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PALLAS WFPC2 IMAGE PC1 F439W 1 5 S ------------------------------------------------------------------------------------------------------------------------------------ 2 PALLAS WFPC2 IMAGE PC1 F439W 1 5 S ------------------------------------------------------------------------------------------------------------------------------------ 3 PALLAS WFPC2 IMAGE PC1 F555W 1 0.6 S ------------------------------------------------------------------------------------------------------------------------------------ 4 PALLAS WFPC2 IMAGE PC1 F555W 1 0.6 S ------------------------------------------------------------------------------------------------------------------------------------ 5 PALLAS WFPC2 IMAGE PC1 F675W 1 0.8 S ------------------------------------------------------------------------------------------------------------------------------------ 6 PALLAS WFPC2 IMAGE PC1 F675W 1 0.8 S ------------------------------------------------------------------------------------------------------------------------------------ 7 PALLAS WFPC2 IMAGE PC1 F814W 1 0.8 S ------------------------------------------------------------------------------------------------------------------------------------ 8 PALLAS WFPC2 IMAGE PC1 F814W 1 0.8 S ------------------------------------------------------------------------------------------------------------------------------------ 9 PALLAS WFPC2 IMAGE PC1 F336W 1 23 S ------------------------------------------------------------------------------------------------------------------------------------ 10 PALLAS WFPC2 IMAGE PC1 F336W 1 23 S ------------------------------------------------------------------------------------------------------------------------------------ 11 PALLAS WFPC2 IMAGE PC1 F555W 1 3 S ------------------------------------------------------------------------------------------------------------------------------------ 12 PALLAS WFPC2 IMAGE PC1 F555W 1 3 S ------------------------------------------------------------------------------------------------------------------------------------ 13 PALLAS WFPC2 IMAGE PC1 F555W 1 0.6 S ------------------------------------------------------------------------------------------------------------------------------------ 14 PALLAS WFPC2 IMAGE PC1 F439W 1 5 S ------------------------------------------------------------------------------------------------------------------------------------ 15 PALLAS WFPC2 IMAGE PC1 F675W 1 0.8 S ------------------------------------------------------------------------------------------------------------------------------------ 16 PALLAS WFPC2 IMAGE PC1 F336W 1 23 S ------------------------------------------------------------------------------------------------------------------------------------ 17 PALLAS WFPC2 IMAGE PC1 F814W 1 0.8 S ------------------------------------------------------------------------------------------------------------------------------------ 18 PALLAS WFPC2 IMAGE PC1 F439W 1 5 S POS TARG -0.5,-0.5 ------------------------------------------------------------------------------------------------------------------------------------ 11115( 5) - 08/28/07 14:28 - [ 5] Exposures ----------------------------------------------------------------------------------------------------------------------------------- Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ----------------------------------------------------------------------------------------------------------------------------------- 19 PALLAS WFPC2 IMAGE PC1 F439W 1 5 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 20 PALLAS WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 21 PALLAS WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 22 PALLAS WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 23 PALLAS WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 24 PALLAS WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 25 PALLAS WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 26 PALLAS WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 27 PALLAS WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 28 PALLAS WFPC2 IMAGE PC1 F555W 1 3 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 29 PALLAS WFPC2 IMAGE PC1 F555W 1 3 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 30 PALLAS WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 31 PALLAS WFPC2 IMAGE PC1 F439W 1 5 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 32 PALLAS WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 33 PALLAS WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 34 PALLAS WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 35 PALLAS WFPC2 IMAGE PC1 F439W 1 5 S POS TARG 0.5, 0.5 ------------------------------------------------------------------------------------------------------------------------------------ 36 PALLAS WFPC2 IMAGE PC1 F439W 1 5 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 37 PALLAS WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 38 PALLAS WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 39 PALLAS WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 40 PALLAS WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 41 PALLAS WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 42 PALLAS WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 11115( 5) - 08/28/07 14:28 - [ 6] Exposures ----------------------------------------------------------------------------------------------------------------------------------- Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ----------------------------------------------------------------------------------------------------------------------------------- 43 PALLAS WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 44 PALLAS WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 45 PALLAS WFPC2 IMAGE PC1 F555W 1 3 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 46 PALLAS WFPC2 IMAGE PC1 F555W 1 3 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 47 PALLAS WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 48 PALLAS WFPC2 IMAGE PC1 F439W 1 5 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 49 PALLAS WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 50 PALLAS WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 51 PALLAS WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 52 PALLAS WFPC2 IMAGE PC1 F439W 1 5 S POS TARG -0.5, 0.5 ------------------------------------------------------------------------------------------------------------------------------------ 53 PALLAS WFPC2 IMAGE PC1 F439W 1 5 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 54 PALLAS WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 55 PALLAS WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 56 PALLAS WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 57 PALLAS WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 58 PALLAS WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 59 PALLAS WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 60 PALLAS WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 61 PALLAS WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 62 PALLAS WFPC2 IMAGE PC1 F555W 1 3 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 63 PALLAS WFPC2 IMAGE PC1 F555W 1 3 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 64 PALLAS WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 65 PALLAS WFPC2 IMAGE PC1 F439W 1 5 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 66 PALLAS WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 11115( 5) - 08/28/07 14:28 - [ 7] Exposures ----------------------------------------------------------------------------------------------------------------------------------- Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ----------------------------------------------------------------------------------------------------------------------------------- 67 PALLAS WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 68 PALLAS WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ PALLAS 1 WFPC2 IMAGE PC1 F439W none none none none 1 N/A PALLAS 2 WFPC2 IMAGE PC1 F439W none none none none 1 N/A PALLAS 3 WFPC2 IMAGE PC1 F555W none none none none 1 N/A PALLAS 4 WFPC2 IMAGE PC1 F555W none none none none 1 N/A PALLAS 5 WFPC2 IMAGE PC1 F675W none none none none 1 N/A PALLAS 6 WFPC2 IMAGE PC1 F675W none none none none 1 N/A PALLAS 7 WFPC2 IMAGE PC1 F814W none none none none 1 N/A PALLAS 8 WFPC2 IMAGE PC1 F814W none none none none 1 N/A PALLAS 9 WFPC2 IMAGE PC1 F336W none none none none 1 N/A PALLAS 10 WFPC2 IMAGE PC1 F336W none none none none 1 N/A PALLAS 11 WFPC2 IMAGE PC1 F555W none none none none 1 N/A PALLAS 12 WFPC2 IMAGE PC1 F555W none none none none 1 N/A PALLAS 13 WFPC2 IMAGE PC1 F555W none none none none 1 N/A PALLAS 14 WFPC2 IMAGE PC1 F439W none none none none 1 N/A PALLAS 15 WFPC2 IMAGE PC1 F675W none none none none 1 N/A PALLAS 16 WFPC2 IMAGE PC1 F336W none none none none 1 N/A PALLAS 17 WFPC2 IMAGE PC1 F814W none none none none 1 N/A PALLAS 18 WFPC2 IMAGE PC1 F439W none none none none 2 N/A PALLAS 19 WFPC2 IMAGE PC1 F439W none none none none 2 N/A PALLAS 20 WFPC2 IMAGE PC1 F555W none none none none 2 N/A PALLAS 21 WFPC2 IMAGE PC1 F555W none none none none 2 N/A PALLAS 22 WFPC2 IMAGE PC1 F675W none none none none 2 N/A PALLAS 23 WFPC2 IMAGE PC1 F675W none none none none 2 N/A PALLAS 24 WFPC2 IMAGE PC1 F814W none none none none 2 N/A PALLAS 25 WFPC2 IMAGE PC1 F814W none none none none 2 N/A PALLAS 26 WFPC2 IMAGE PC1 F336W none none none none 2 N/A PALLAS 27 WFPC2 IMAGE PC1 F336W none none none none 2 N/A PALLAS 28 WFPC2 IMAGE PC1 F555W none none none none 2 N/A PALLAS 29 WFPC2 IMAGE PC1 F555W none none none none 2 N/A PALLAS 30 WFPC2 IMAGE PC1 F555W none none none none 2 N/A PALLAS 31 WFPC2 IMAGE PC1 F439W none none none none 2 N/A PALLAS 32 WFPC2 IMAGE PC1 F675W none none none none 2 N/A PALLAS 33 WFPC2 IMAGE PC1 F336W none none none none 2 N/A PALLAS 34 WFPC2 IMAGE PC1 F814W none none none none 2 N/A PALLAS 35 WFPC2 IMAGE PC1 F439W none none none none 3 N/A PALLAS 36 WFPC2 IMAGE PC1 F439W none none none none 3 N/A PALLAS 37 WFPC2 IMAGE PC1 F555W none none none none 3 N/A PALLAS 38 WFPC2 IMAGE PC1 F555W none none none none 3 N/A 11115( 5) - 08/28/07 14:28 - [ 8] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ PALLAS 39 WFPC2 IMAGE PC1 F675W none none none none 3 N/A PALLAS 40 WFPC2 IMAGE PC1 F675W none none none none 3 N/A PALLAS 41 WFPC2 IMAGE PC1 F814W none none none none 3 N/A PALLAS 42 WFPC2 IMAGE PC1 F814W none none none none 3 N/A PALLAS 43 WFPC2 IMAGE PC1 F336W none none none none 3 N/A PALLAS 44 WFPC2 IMAGE PC1 F336W none none none none 3 N/A PALLAS 45 WFPC2 IMAGE PC1 F555W none none none none 3 N/A PALLAS 46 WFPC2 IMAGE PC1 F555W none none none none 3 N/A PALLAS 47 WFPC2 IMAGE PC1 F555W none none none none 3 N/A PALLAS 48 WFPC2 IMAGE PC1 F439W none none none none 3 N/A PALLAS 49 WFPC2 IMAGE PC1 F675W none none none none 3 N/A PALLAS 50 WFPC2 IMAGE PC1 F336W none none none none 3 N/A PALLAS 51 WFPC2 IMAGE PC1 F814W none none none none 3 N/A PALLAS 52 WFPC2 IMAGE PC1 F439W none none none none 4 N/A PALLAS 53 WFPC2 IMAGE PC1 F439W none none none none 4 N/A PALLAS 54 WFPC2 IMAGE PC1 F555W none none none none 4 N/A PALLAS 55 WFPC2 IMAGE PC1 F555W none none none none 4 N/A PALLAS 56 WFPC2 IMAGE PC1 F675W none none none none 4 N/A PALLAS 57 WFPC2 IMAGE PC1 F675W none none none none 4 N/A PALLAS 58 WFPC2 IMAGE PC1 F814W none none none none 4 N/A PALLAS 59 WFPC2 IMAGE PC1 F814W none none none none 4 N/A PALLAS 60 WFPC2 IMAGE PC1 F336W none none none none 4 N/A PALLAS 61 WFPC2 IMAGE PC1 F336W none none none none 4 N/A PALLAS 62 WFPC2 IMAGE PC1 F555W none none none none 4 N/A PALLAS 63 WFPC2 IMAGE PC1 F555W none none none none 4 N/A PALLAS 64 WFPC2 IMAGE PC1 F555W none none none none 4 N/A PALLAS 65 WFPC2 IMAGE PC1 F439W none none none none 4 N/A PALLAS 66 WFPC2 IMAGE PC1 F675W none none none none 4 N/A PALLAS 67 WFPC2 IMAGE PC1 F336W none none none none 4 N/A PALLAS 68 WFPC2 IMAGE PC1 F814W none none none none 4 N/A 11115( 5) - 08/28/07 14:28 - [ 9] Visit: 02 Visit Priority: Visit Requirements: BETWEEN 01-SEP-2007:00:00:00 AND 09-SEP-2007:00:00:00 On Hold Comments: Additional Comments: It is important that this visit be scheduled as close to the opposition of Pallas as possible in order to illuminate the greatest fraction of the asteroid as well as provide the best spatial resolution. Pallas is at minimum phase 3.98 on 2007-Sep-04 00:00 UT. Pallas is below 4.5 degrees from Aug 29-Sept 9, however, its largest angular size of 0.326 arcseconds occurs from Sept 4-9. Ideally, we will be scheduled on or just after Sept 4. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PALLAS-COPY WFPC2 IMAGE PC1 F439W 1 5 S GS ACQ SCENARIO SINGLE ------------------------------------------------------------------------------------------------------------------------------------ 2 PALLAS-COPY WFPC2 IMAGE PC1 F439W 1 5 S ------------------------------------------------------------------------------------------------------------------------------------ 3 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 0.6 S ------------------------------------------------------------------------------------------------------------------------------------ 4 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 0.6 S ------------------------------------------------------------------------------------------------------------------------------------ 5 PALLAS-COPY WFPC2 IMAGE PC1 F675W 1 0.8 S ------------------------------------------------------------------------------------------------------------------------------------ 6 PALLAS-COPY WFPC2 IMAGE PC1 F675W 1 0.8 S ------------------------------------------------------------------------------------------------------------------------------------ 7 PALLAS-COPY WFPC2 IMAGE PC1 F814W 1 0.8 S ------------------------------------------------------------------------------------------------------------------------------------ 8 PALLAS-COPY WFPC2 IMAGE PC1 F814W 1 0.8 S ------------------------------------------------------------------------------------------------------------------------------------ 9 PALLAS-COPY WFPC2 IMAGE PC1 F336W 1 23 S ------------------------------------------------------------------------------------------------------------------------------------ 10 PALLAS-COPY WFPC2 IMAGE PC1 F336W 1 23 S ------------------------------------------------------------------------------------------------------------------------------------ 11 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 3 S ------------------------------------------------------------------------------------------------------------------------------------ 12 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 3 S ------------------------------------------------------------------------------------------------------------------------------------ 13 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 0.6 S ------------------------------------------------------------------------------------------------------------------------------------ 14 PALLAS-COPY WFPC2 IMAGE PC1 F439W 1 5 S ------------------------------------------------------------------------------------------------------------------------------------ 15 PALLAS-COPY WFPC2 IMAGE PC1 F675W 1 0.8 S ------------------------------------------------------------------------------------------------------------------------------------ 16 PALLAS-COPY WFPC2 IMAGE PC1 F336W 1 23 S ------------------------------------------------------------------------------------------------------------------------------------ 17 PALLAS-COPY WFPC2 IMAGE PC1 F814W 1 0.8 S ------------------------------------------------------------------------------------------------------------------------------------ 18 PALLAS-COPY WFPC2 IMAGE PC1 F439W 1 5 S POS TARG -0.5,-0.5 ------------------------------------------------------------------------------------------------------------------------------------ 11115( 5) - 08/28/07 14:28 - [ 10] Exposures ----------------------------------------------------------------------------------------------------------------------------------- Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ----------------------------------------------------------------------------------------------------------------------------------- 19 PALLAS-COPY WFPC2 IMAGE PC1 F439W 1 5 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 20 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 21 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 22 PALLAS-COPY WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 23 PALLAS-COPY WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 24 PALLAS-COPY WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 25 PALLAS-COPY WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 26 PALLAS-COPY WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 27 PALLAS-COPY WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 28 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 3 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 29 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 3 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 30 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 31 PALLAS-COPY WFPC2 IMAGE PC1 F439W 1 5 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 32 PALLAS-COPY WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 33 PALLAS-COPY WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 34 PALLAS-COPY WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 18 ------------------------------------------------------------------------------------------------------------------------------------ 35 PALLAS-COPY WFPC2 IMAGE PC1 F439W 1 5 S POS TARG 0.5, 0.5 ------------------------------------------------------------------------------------------------------------------------------------ 36 PALLAS-COPY WFPC2 IMAGE PC1 F439W 1 5 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 37 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 38 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 39 PALLAS-COPY WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 40 PALLAS-COPY WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 41 PALLAS-COPY WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 42 PALLAS-COPY WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 11115( 5) - 08/28/07 14:28 - [ 11] Exposures ----------------------------------------------------------------------------------------------------------------------------------- Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ----------------------------------------------------------------------------------------------------------------------------------- 43 PALLAS-COPY WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 44 PALLAS-COPY WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 45 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 3 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 46 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 3 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 47 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 48 PALLAS-COPY WFPC2 IMAGE PC1 F439W 1 5 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 49 PALLAS-COPY WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 50 PALLAS-COPY WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 51 PALLAS-COPY WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 35 ------------------------------------------------------------------------------------------------------------------------------------ 52 PALLAS-COPY WFPC2 IMAGE PC1 F439W 1 5 S POS TARG -0.5, 0.5 ------------------------------------------------------------------------------------------------------------------------------------ 53 PALLAS-COPY WFPC2 IMAGE PC1 F439W 1 5 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 54 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 55 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 56 PALLAS-COPY WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 57 PALLAS-COPY WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 58 PALLAS-COPY WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 59 PALLAS-COPY WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 60 PALLAS-COPY WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 61 PALLAS-COPY WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 62 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 3 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 63 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 3 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 64 PALLAS-COPY WFPC2 IMAGE PC1 F555W 1 0.6 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 65 PALLAS-COPY WFPC2 IMAGE PC1 F439W 1 5 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 66 PALLAS-COPY WFPC2 IMAGE PC1 F675W 1 0.8 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 11115( 5) - 08/28/07 14:28 - [ 12] Exposures ----------------------------------------------------------------------------------------------------------------------------------- Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ----------------------------------------------------------------------------------------------------------------------------------- 67 PALLAS-COPY WFPC2 IMAGE PC1 F336W 1 23 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ 68 PALLAS-COPY WFPC2 IMAGE PC1 F814W 1 0.8 S SAME POS AS 52 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ PALLAS-COPY 1 WFPC2 IMAGE PC1 F439W none none none none 1 N/A PALLAS-COPY 2 WFPC2 IMAGE PC1 F439W none none none none 1 N/A PALLAS-COPY 3 WFPC2 IMAGE PC1 F555W none none none none 1 N/A PALLAS-COPY 4 WFPC2 IMAGE PC1 F555W none none none none 1 N/A PALLAS-COPY 5 WFPC2 IMAGE PC1 F675W none none none none 1 N/A PALLAS-COPY 6 WFPC2 IMAGE PC1 F675W none none none none 1 N/A PALLAS-COPY 7 WFPC2 IMAGE PC1 F814W none none none none 1 N/A PALLAS-COPY 8 WFPC2 IMAGE PC1 F814W none none none none 1 N/A PALLAS-COPY 9 WFPC2 IMAGE PC1 F336W none none none none 1 N/A PALLAS-COPY 10 WFPC2 IMAGE PC1 F336W none none none none 1 N/A PALLAS-COPY 11 WFPC2 IMAGE PC1 F555W none none none none 1 N/A PALLAS-COPY 12 WFPC2 IMAGE PC1 F555W none none none none 1 N/A PALLAS-COPY 13 WFPC2 IMAGE PC1 F555W none none none none 1 N/A PALLAS-COPY 14 WFPC2 IMAGE PC1 F439W none none none none 1 N/A PALLAS-COPY 15 WFPC2 IMAGE PC1 F675W none none none none 1 N/A PALLAS-COPY 16 WFPC2 IMAGE PC1 F336W none none none none 1 N/A PALLAS-COPY 17 WFPC2 IMAGE PC1 F814W none none none none 1 N/A PALLAS-COPY 18 WFPC2 IMAGE PC1 F439W none none none none 2 N/A PALLAS-COPY 19 WFPC2 IMAGE PC1 F439W none none none none 2 N/A PALLAS-COPY 20 WFPC2 IMAGE PC1 F555W none none none none 2 N/A PALLAS-COPY 21 WFPC2 IMAGE PC1 F555W none none none none 2 N/A PALLAS-COPY 22 WFPC2 IMAGE PC1 F675W none none none none 2 N/A PALLAS-COPY 23 WFPC2 IMAGE PC1 F675W none none none none 2 N/A PALLAS-COPY 24 WFPC2 IMAGE PC1 F814W none none none none 2 N/A PALLAS-COPY 25 WFPC2 IMAGE PC1 F814W none none none none 2 N/A PALLAS-COPY 26 WFPC2 IMAGE PC1 F336W none none none none 2 N/A PALLAS-COPY 27 WFPC2 IMAGE PC1 F336W none none none none 2 N/A PALLAS-COPY 28 WFPC2 IMAGE PC1 F555W none none none none 2 N/A PALLAS-COPY 29 WFPC2 IMAGE PC1 F555W none none none none 2 N/A PALLAS-COPY 30 WFPC2 IMAGE PC1 F555W none none none none 2 N/A PALLAS-COPY 31 WFPC2 IMAGE PC1 F439W none none none none 2 N/A PALLAS-COPY 32 WFPC2 IMAGE PC1 F675W none none none none 2 N/A PALLAS-COPY 33 WFPC2 IMAGE PC1 F336W none none none none 2 N/A PALLAS-COPY 34 WFPC2 IMAGE PC1 F814W none none none none 2 N/A PALLAS-COPY 35 WFPC2 IMAGE PC1 F439W none none none none 3 N/A PALLAS-COPY 36 WFPC2 IMAGE PC1 F439W none none none none 3 N/A PALLAS-COPY 37 WFPC2 IMAGE PC1 F555W none none none none 3 N/A PALLAS-COPY 38 WFPC2 IMAGE PC1 F555W none none none none 3 N/A 11115( 5) - 08/28/07 14:28 - [ 13] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ PALLAS-COPY 39 WFPC2 IMAGE PC1 F675W none none none none 3 N/A PALLAS-COPY 40 WFPC2 IMAGE PC1 F675W none none none none 3 N/A PALLAS-COPY 41 WFPC2 IMAGE PC1 F814W none none none none 3 N/A PALLAS-COPY 42 WFPC2 IMAGE PC1 F814W none none none none 3 N/A PALLAS-COPY 43 WFPC2 IMAGE PC1 F336W none none none none 3 N/A PALLAS-COPY 44 WFPC2 IMAGE PC1 F336W none none none none 3 N/A PALLAS-COPY 45 WFPC2 IMAGE PC1 F555W none none none none 3 N/A PALLAS-COPY 46 WFPC2 IMAGE PC1 F555W none none none none 3 N/A PALLAS-COPY 47 WFPC2 IMAGE PC1 F555W none none none none 3 N/A PALLAS-COPY 48 WFPC2 IMAGE PC1 F439W none none none none 3 N/A PALLAS-COPY 49 WFPC2 IMAGE PC1 F675W none none none none 3 N/A PALLAS-COPY 50 WFPC2 IMAGE PC1 F336W none none none none 3 N/A PALLAS-COPY 51 WFPC2 IMAGE PC1 F814W none none none none 3 N/A PALLAS-COPY 52 WFPC2 IMAGE PC1 F439W none none none none 4 N/A PALLAS-COPY 53 WFPC2 IMAGE PC1 F439W none none none none 4 N/A PALLAS-COPY 54 WFPC2 IMAGE PC1 F555W none none none none 4 N/A PALLAS-COPY 55 WFPC2 IMAGE PC1 F555W none none none none 4 N/A PALLAS-COPY 56 WFPC2 IMAGE PC1 F675W none none none none 4 N/A PALLAS-COPY 57 WFPC2 IMAGE PC1 F675W none none none none 4 N/A PALLAS-COPY 58 WFPC2 IMAGE PC1 F814W none none none none 4 N/A PALLAS-COPY 59 WFPC2 IMAGE PC1 F814W none none none none 4 N/A PALLAS-COPY 60 WFPC2 IMAGE PC1 F336W none none none none 4 N/A PALLAS-COPY 61 WFPC2 IMAGE PC1 F336W none none none none 4 N/A PALLAS-COPY 62 WFPC2 IMAGE PC1 F555W none none none none 4 N/A PALLAS-COPY 63 WFPC2 IMAGE PC1 F555W none none none none 4 N/A PALLAS-COPY 64 WFPC2 IMAGE PC1 F555W none none none none 4 N/A PALLAS-COPY 65 WFPC2 IMAGE PC1 F439W none none none none 4 N/A PALLAS-COPY 66 WFPC2 IMAGE PC1 F675W none none none none 4 N/A PALLAS-COPY 67 WFPC2 IMAGE PC1 F336W none none none none 4 N/A PALLAS-COPY 68 WFPC2 IMAGE PC1 F814W none none none none 4 N/A 11115( 5) - 08/28/07 14:28 - [ 14] Summary Form for Proposal 11115 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PC1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 01-SEP-2007 00 00 00 AND 09-SEP-2007 00 00 00; POS TARG -0.5,-0.5; SAME POS AS 18; POS TARG 0.5, 0.5; SAME POS AS 35; POS TARG -0.5, 0.5; SAME POS AS 52; BETWEEN 01-SEP-2007 00 00 00 AND 09-SEP-2007 00 00 00; GS ACQ SCENARIO SINGLE; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F439W F555W F675W F814W F336W ------------------------------------------------------------------------------------------------------------------------------------ Target Names PALLAS PALLAS-COPY ------------------------------------------------------------------------------------------------------------------------------------