7916( 5) - 12/15/97 12:03 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 7916 Version: 5 Check-in Date: 15-Dec-1997 12:02:17 1.Proposal Title: The Nucleus of Comet 9P/Tempel 1 ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle NASA 7 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: PHILIPPE LAMY LABORATOIRE D'ASTRONOMIE SPATIALE CoI: Michael A'HEARN University of Maryland N CoI: Imre TOTH Konkoly Observatory N CoI: Harold WEAVER The John Hopkins IUniversity N CoI: Paul WEISSMAN Jet Propulsion Laboratory N ------------------------------------------------------------------------------------ 5. Abstract We propose to make WFPC2 observations of comet 9P/Tempel 1 during its current (1997- 1998) opposition in order to determine the properties of its nucleus (size, shape, and rotational period) in support of the NASA DS4/Champollion mission. Owing to its superior spatial resolution, HST observations of the comet will provide unique data that will be used by scientists and engineers at JPL to optimize various mission design parameters on DS4. We plan to take deep R-band images of the comet on 8 consecutive (or nearly so) orbits sometime between 1 DEC 1997 and 12 JAN 1998. ------------------------------------------------------------------------------------ Observations Description ------------------------ This program was allocated 8 orbits. Although the comet will be moving at a relatively slow rate (about 0.008 arcsec/sec), we have designed the program as consisting of 8 separate visits in order to provide more scheduling flexibility. All orbits have the same structure: 2 PC images of 1000 sec duration are taken through the F675W filter. We request that the 8 orbits be scheduled as close to consecutively as possible. We can tolerate up to a few 1- orbit gaps in the schedule if necessary. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 7916( 5) - 12/15/97 12:03 - [ 2] Data Distribution Media: ELECTRONIC Blocking Factor: 10 Ship To: Dr. Harold A. Weaver, 48 Bellchase Court, Baltimore, MD 21208 Ship Via: Email: weaver@pha.jhu.edu ------------------------------------------------------------------------------------ 7916( 5) - 12/15/97 12:03 - [ 3] TARGET LIST b)Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 | TARGET NAME: TEMPEL-1 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: COMET Tempel-1 ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | TYPE=COMET,Q=1.4981316,E=0.5193262,I=10. | 54477,O=68.98599,W=178.95916,T = 02-Jan- | 2000:12:31:46.0,EQUINOX=J2000,EPOCH=05- | Jan-1998 | | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | ------------------------------------------------------------------------------------------------------------------------------------ DATA | COMMENTS | V = 21.0+/-1 | V-mag is for the nucleus. The coma B-V = 0.8 | might contribute some extra flux to V-R = 0.4 | the peak pixel but should be below | the nucleus contribution. These | elements are from JPL 12 and should | be good enough for scheduling. | Ephemeris Uncertainty: 13000 KM | Acquisition Uncertainty: 5 " | ------------------------------------------------------------------------------------------------------------------------------------ 7916( 5) - 12/15/97 12:03 - [ 4] Visit: 01 Visit Priority: Visit Requirements: BETWEEN 01-Dec-1997 AND 12-Jan-1998 SCHED 100% On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 11 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T1 SEQ 11-12 NON-INT Comments: First image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 12 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T1 Comments: Second image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 7916( 5) - 12/15/97 12:03 - [ 5] Visit: 02 Visit Priority: Visit Requirements: AFTER 01 BY 0.75 Orbits TO 2.25 Orbits SCHED 100% On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 21 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T2 SEQ 21-22 NON-INT Comments: First image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 22 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T2 Comments: Second image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 7916( 5) - 12/15/97 12:03 - [ 6] Visit: 03 Visit Priority: Visit Requirements: AFTER 02 BY 0.75 Orbits TO 2.25 Orbits SCHED 100% On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 31 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T3 SEQ 31-32 NON-INT Comments: First image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 32 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T3 Comments: Second image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 7916( 5) - 12/15/97 12:03 - [ 7] Visit: 04 Visit Priority: Visit Requirements: AFTER 03 BY 0.75 Orbits TO 2.25 Orbits SCHED 100% On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 41 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T4 SEQ 41-42 NON-INT Comments: First image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 42 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T4 Comments: Second image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 7916( 5) - 12/15/97 12:03 - [ 8] Visit: 05 Visit Priority: Visit Requirements: AFTER 04 BY 0.75 Orbits TO 2.25 Orbits SCHED 100% On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 51 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T5 SEQ 51-52 NON-INT Comments: First image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 52 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T5 Comments: Second image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 7916( 5) - 12/15/97 12:03 - [ 9] Visit: 06 Visit Priority: Visit Requirements: AFTER 05 BY 0.75 Orbits TO 2.25 Orbits SCHED 100% On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 61 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T6 SEQ 61-62 NON-INT Comments: First image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 62 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T6 Comments: Second image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 7916( 5) - 12/15/97 12:03 - [ 10] Visit: 07 Visit Priority: Visit Requirements: AFTER 06 BY 0.75 Orbits TO 2.25 Orbits SCHED 100% On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 71 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T7 SEQ 71-72 NON-INT Comments: First image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 72 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T7 Comments: Second image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 7916( 5) - 12/15/97 12:03 - [ 11] Visit: 08 Visit Priority: Visit Requirements: AFTER 07 BY 0.75 Orbits TO 2.25 Orbits SCHED 100% On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 81 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T8 SEQ 81-82 NON-INT SAA-CONTOUR 02 Comments: First image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 82 TEMPEL-1 WFPC2 IMAGE PC1-FIX F675W CR-SPLIT=NO 1 1000 S REQ EPHEM CORR T8 SAA-CONTOUR 02 Comments: Second image in orbit ------------------------------------------------------------------------------------------------------------------------------------ 7916( 5) - 12/15/97 12:03 - [ 12] Summary Form for Proposal 7916 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category NASA ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 01-Dec-1997 AND 12-Jan-1998 SCHED 100% REQ EPHEM CORR T1 SEQ 11-12 NON-INT REQ EPHEM CORR T1 AFTER 01 BY 0.75 Orbits TO 2.25 Orbits SCHED 100% REQ EPHEM CORR T2 SEQ 21-22 NON-INT REQ EPHEM CORR T2 AFTER 02 BY 0.75 Orbits TO 2.25 Orbits SCHED 100% REQ EPHEM CORR T3 SEQ 31-32 NON-INT REQ EPHEM CORR T3 AFTER 03 BY 0.75 Orbits TO 2.25 Orbits SCHED 100% REQ EPHEM CORR T4 SEQ 41-42 NON-INT REQ EPHEM CORR T4 AFTER 04 BY 0.75 Orbits TO 2.25 Orbits SCHED 100% REQ EPHEM CORR T5 SEQ 51-52 NON-INT REQ EPHEM CORR T5 AFTER 05 BY 0.75 Orbits TO 2.25 Orbits SCHED 100% REQ EPHEM CORR T6 SEQ 61-62 NON-INT REQ EPHEM CORR T6 AFTER 06 BY 0.75 Orbits TO 2.25 Orbits SCHED 100% REQ EPHEM CORR T7 SEQ 71-72 NON-INT REQ EPHEM CORR T7 AFTER 07 BY 0.75 Orbits TO 2.25 Orbits SCHED 100% REQ EPHEM CORR T8 SEQ 81-82 NON-INT SAA-CONTOUR 02 REQ EPHEM CORR T8 SAA-CONTOUR 02 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F675W ------------------------------------------------------------------------------------------------------------------------------------ Target Names TEMPEL-1 ------------------------------------------------------------------------------------------------------------------------------------