17089( 8) - 09-May-2023 12:43:36 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17089 Version: 8 Check-in Time: 09-May-2023 12:43:36 STScI Edit Number: 1 Title Characterizing Primitive Asteroids ------------------------------------------------------------------------------------ Type Cycle GO 30 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Amanda R. Hendrix Planetary Science Institute Y CoI: Dr. Faith Vilas Planetary Science Institute N ------------------------------------------------------------------------------------ Abstract Primitive classes of asteroids, namely those of the B, P, D and C-complex types, are not well characterized in terms of surface composition due to a lack of diagnostic spectral features at visible-near infrared (VNIR) wavelengths. This presents a critical problem because these are important objects due to their primitive nature and their links to early solar system processes. Indeed, the upcoming Lucy mission will visit C-type asteroid Donaldjohanson and several Trojan asteroids (P and D type asteroids). However, despite a lack of spectral features at VNIR wavelengths, these objects do exhibit varying strengths of UV absorption, as observed by the International Ultraviolet Explorer (IUE), which may be related to volatile abundance and thermal history. We propose to observe 6 low-albedo class main belt asteroids to characterize them in terms of their UV spectral shape. We will test the hypothesis that a spectral trend with heliocentric distance should be present, based on the changing thermal and compositional environment. ------------------------------------------------------------------------------------ Observations Description ------------------------ This program will observe 6 outer main belt asteroid targets using STIS, with one target per orbit/visit. Each visit will include two exposures: one longer exposure using G230L/MAMA and a shorter one using G430L/CCD. The CCD exposures will use offset pointing for CTE mitigation. ------------------------------------------------------------------------------------ 17089( 8) - 09-May-2023 12:43:36 - [ 2] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: THEMIS ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: ASTEROID 24 Themis asteroid ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 TYPE=ASTEROID, A=3.134879349072954, E=0.1259217958378979, I=0.752323904777179 , O=35.92116269669565, W=106.6067772864299, M=22.35714114467564, EQUINOX=J2000, EPOCH=06-MAR-2014:00:00:00, EpochTimeScale=TDB ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 12.46 +/- 0.025 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 2 TARGET NAME: PALMA ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: ASTEROID asteroid 372 Palma ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 TYPE=ASTEROID, A=3.150020513122523, E=0.2611380629859947, I=23.82974621034009 , O=327.4141080476642, W=115.4331094124759, M=341.0547634869388, EQUINOX=J2000, EPOCH=02-JAN-2012:00:00:00, EpochTimeScale=TDB ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 11.54 +/- 0.1 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 17089( 8) - 09-May-2023 12:43:36 - [ 3] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 3 TARGET NAME: CYBELE ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: ASTEROID asteroid 65 Cybele ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 TYPE=ASTEROID, A=3.433776159890824, E=0.105263696768593, I=3.548344737993872 , O=155.8055828192899, W=105.7308396447282, M=317.6871541471297, EQUINOX=J2000, EPOCH=02-SEP-2007:00:00:00, EpochTimeScale=TDB ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 11.08 +/- 0.05 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 4 TARGET NAME: HILDA ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: ASTEROID asteroid 153 Hilda ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 TYPE=ASTEROID, A=3.972374569367627, E=0.1384991297739193, I=7.82775693904481 , O=228.1742371275046, W=38.81074300877074, M=255.8899187990015, EQUINOX=J2000, EPOCH=26-FEB-2013:00:00:00, EpochTimeScale=TDB ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 12.5 +/- 0.01 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 17089( 8) - 09-May-2023 12:43:36 - [ 4] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 5 TARGET NAME: THULE ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: ASTEROID asteroid 279 Thule ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 TYPE=ASTEROID, A=4.281267063982855, E=0.008484263073287767, I=2.337510754510939 , O=73.62783534541818, W=69.78103470405526, M=261.8068918252008, EQUINOX=J2000, EPOCH=08-APR-2013:00:00:00, EpochTimeScale=TDB ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 14.3 +/- 0.2 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 6 TARGET NAME: ODA ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: ASTEROID asteroid 1144 Oda ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 TYPE=ASTEROID, A=3.749793930356727, E=0.09491125273812136, I=9.742818840181293 , O=156.731126886498, W=220.9524602429168, M=18.02049356168965, EQUINOX=J2000, EPOCH=25-MAY-2015:00:00:00, EpochTimeScale=TDB ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 15.3 +/- 0.01 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 17089( 8) - 09-May-2023 12:43:36 - [ 5] Visit: 01 Visit Requirements: BETWEEN 30-SEP-2022:00:00:00 AND 05-OCT-2022:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 THEMIS STIS/CCD ACQ F28X50LP MIRROR 1 0.1 S (0.1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 THEMIS STIS/NUV ACCUM 52X0.2 G230L 2376 1 1395 S -MAMA (1395 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 THEMIS STIS/CCD ACCUM 52X0.2E1 G430L 4300 1 20 S (20 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ THEMIS 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A THEMIS 2 STIS/NUV ACCUM 52X0.2 G230L 2376 none none none none 1 N/A -MAMA THEMIS 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 1 1 N/A THEMIS 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 2 1 N/A 17089( 8) - 09-May-2023 12:43:36 - [ 6] Visit: 02 Visit Requirements: BETWEEN 30-SEP-2022:00:00:00 AND 21-OCT-2022:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PALMA STIS/CCD ACQ F28X50LP MIRROR 1 0.1 S (0.1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 PALMA STIS/NUV ACCUM 52X0.2 G230L 2376 1 1400 S -MAMA (1400 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 PALMA STIS/CCD ACCUM 52X0.2E1 G430L 4300 1 10 S (10 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ PALMA 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A PALMA 2 STIS/NUV ACCUM 52X0.2 G230L 2376 none none none none 1 N/A -MAMA PALMA 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 1 1 N/A PALMA 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 2 1 N/A 17089( 8) - 09-May-2023 12:43:36 - [ 7] Visit: 03 Visit Requirements: BETWEEN 30-SEP-2022:00:00:00 AND 04-OCT-2022:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 CYBELE STIS/CCD ACQ F28X50LP MIRROR 1 0.1 S (0.1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 CYBELE STIS/NUV ACCUM 52X0.2 G230L 2376 1 1368 S -MAMA (1368 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 CYBELE STIS/CCD ACCUM 52X0.2 G430L 4300 1 20 S (20 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ CYBELE 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A CYBELE 2 STIS/NUV ACCUM 52X0.2 G230L 2376 none none none none 1 N/A -MAMA CYBELE 3 STIS/CCD ACCUM 52X0.2 G430L 4300 none none none 1 1 N/A CYBELE 3 STIS/CCD ACCUM 52X0.2 G430L 4300 none none none 2 1 N/A 17089( 8) - 09-May-2023 12:43:36 - [ 8] Visit: 04 Visit Requirements: BETWEEN 13-JUN-2023:00:00:00 AND 14-JUN-2023:03:30:00; BETWEEN 14-JUN-2023:04:30:00 AND 15-JUN-2023:04:30:00; BETWEEN 15-JUN-2023:05:30:00 AND 15-JUN-2023:08:00:00; BETWEEN 15-JUN-2023:09:00:00 AND 04-JUL-2023:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HILDA STIS/CCD ACQ F28X50LP MIRROR 1 0.1 S (0.1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HILDA STIS/NUV ACCUM 52X0.2 G230L 2376 1 1380 S -MAMA (1380 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HILDA STIS/CCD ACCUM 52X0.2E1 G430L 4300 1 30 S (30 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ HILDA 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A HILDA 2 STIS/NUV ACCUM 52X0.2 G230L 2376 none none none none 1 N/A -MAMA HILDA 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 1 1 N/A HILDA 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 2 1 N/A 17089( 8) - 09-May-2023 12:43:36 - [ 9] Visit: 05 Visit Requirements: BETWEEN 20-OCT-2022:00:00:00 AND 01-DEC-2022:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 ODA STIS/CCD ACQ F28X50LP MIRROR 1 0.1 S (0.1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ODA STIS/NUV ACCUM 52X0.2 G230L 2376 1 1320 S -MAMA (1320 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 ODA STIS/CCD ACCUM 52X0.2E1 G430L 4300 1 100 S (100 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ODA 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A ODA 2 STIS/NUV ACCUM 52X0.2 G230L 2376 none none none none 1 N/A -MAMA ODA 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 1 1 N/A ODA 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 2 1 N/A 17089( 8) - 09-May-2023 12:43:36 - [ 10] Visit: 06 Visit Requirements: BETWEEN 02-DEC-2022:00:00:00 AND 11-DEC-2022:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 THULE STIS/CCD ACQ F28X50LP MIRROR 1 0.1 S (0.1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 THULE STIS/NUV ACCUM 52X0.2 G230L 2376 1 1320 S -MAMA (1320 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 THULE STIS/CCD ACCUM 52X0.2E1 G430L 4300 1 100 S (100 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ THULE 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A THULE 2 STIS/NUV ACCUM 52X0.2 G230L 2376 none none none none 1 N/A -MAMA THULE 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 1 1 N/A THULE 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 2 1 N/A 17089( 8) - 09-May-2023 12:43:36 - [ 11] Visit: 52 Visit Requirements: BETWEEN 31-JAN-2023:00:00:00 AND 22-FEB-2023:00:00:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PALMA STIS/CCD ACQ F28X50LP MIRROR 1 0.1 S (0.1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 PALMA STIS/NUV ACCUM 52X0.2 G230L 2376 1 1400 S -MAMA (1400 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 PALMA STIS/CCD ACCUM 52X0.2E1 G430L 4300 1 20 S (20 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ PALMA 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A PALMA 2 STIS/NUV ACCUM 52X0.2 G230L 2376 none none none none 1 N/A -MAMA PALMA 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 1 1 N/A PALMA 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 2 1 N/A 17089( 8) - 09-May-2023 12:43:36 - [ 12] Summary Form for Proposal 17089 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 52X0.2, 52X0.2E1, F28X50LP ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 02-DEC-2022:00:00:00 AND 11-DEC-2022:00:00:00, BETWEEN 13-JUN-2023:00:00:00 AND 14-JUN-2023:03:30:00, BETWEEN 14-JUN-2023:04:30:00 AND 15-JUN-2023:04:30:00, BETWEEN 15-JUN-2023:05:30:00 AND 15-JUN-2023:08:00:00, BETWEEN 15-JUN-2023:09:00:00 AND 04-JUL-2023:00:00:00, BETWEEN 20-OCT-2022:00:00:00 AND 01-DEC-2022:00:00:00, BETWEEN 30-SEP-2022:00:00:00 AND 04-OCT-2022:00:00:00, BETWEEN 30-SEP-2022:00:00:00 AND 05-OCT-2022:00:00:00, BETWEEN 30-SEP-2022:00:00:00 AND 21-OCT-2022:00:00:00, BETWEEN 31-JAN-2023:00:00:00 AND 22-FEB-2023:00:00:00 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G230L, G430L, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names CYBELE, HILDA, ODA, PALMA, THEMIS, THULE ------------------------------------------------------------------------------------------------------------------------------------