16088( 7) - 03-Sep-2020 15:51:45 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16088 Version: 7 Check-in Time: 03-Sep-2020 15:51:45 STScI Edit Number: 4 Title Tracking the Outbound Motion of Interstellar Comet 2I/Borisov. ------------------------------------------------------------------------------------ Type Cycle GO 27 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Karen J. Meech University of Hawaii Y CoI: Dr. Marc W. Buie Southwest Research Institute Y CoI: Dr. Davide Farnocchia Jet Propulsion Laboratory N CoI: Dr. Marco Micheli ESA SSA-NEO Coordination Centre N CoI: Dr. David Tholen University of Hawaii N CoI: Olivier Raoul Hainaut European Southern Observatory - Germany N CoI: Dr. Hermann Boehnhardt Max Planck Institute for Solar System N Research CoI: Dr. Coryn A. L. Bailer-Jones Max-Planck-Institut fur Astronomie, N Heidelberg CoI: Dr. Jan Kleyna University of Hawaii N CoI: Dr. Jacqueline Keane University of Hawaii Y ------------------------------------------------------------------------------------ Abstract We are requesting 10 orbits to (1) perform high precision astrometry on the outbound orbit to model the non-gravitational acceleration and model the activity drivers; (2) confirm the rotation period detected in the previous HST program 16043, but with better contrast to get the nucleus axis ratio; (3) use the jets detected in the HST data to constrain the rotation pole; and (4) to observe the Earth's orbit plane crossing to analyze the activity profile of the large dust grains. For these observations we will use WFC3/UVIS imaging with F350LP passband. This request is to obtain data during 2020 March-September and the only way to secure this time is through a mid-cycle request. ------------------------------------------------------------------------------------ Observations Description ------------------------ We want these to be approximately monthly, time constraint can be quite loose (~1-2 week window per visit). Thus one orbit in April, May, June, July, early Sep and late Sep, as close to 9/30 as possible or early October. For the August Visit - we want 4 orbits within +/- 5 days of August 1, the orbit plane crossing date. Randomly spread is fine in that period. All data are full UVIS field images to ensure sufficient astrometric reference stars to get precise positional measurements on the comet. ------------------------------------------------------------------------------------ 16088( 7) - 03-Sep-2020 15:51:45 - [ 2] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: I2-BOROSOV ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: COMET Interstellar Object ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 TYPE=COMET, Q=2.006624008587265, E=3.356191268153205, I=44.05262620283894 , O=308.1489154698829, W=209.1246056235187, T=08-DEC-2019:13:04:38, TTimeScale=TDB, EQUINOX=J2000, EPOCH=31-JUL-2020:00:00:00, EpochTimeScale=TDB, R0=2.808 , DT=0. , A1=7.312064170837E-8, A2=-3.252092599869E-8, A3=0. , ALN=0.1112620426, NM=2.15, NN=5.093, NK=4.6142, AMRAT=0. ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 23 +/- 3 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 16088( 7) - 03-Sep-2020 15:51:45 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type LINE Pattern_Purpose OTHER Number_Of_Points 5 Point_Spacing 0.03 Line_Spacing Coordinate_Frame CELESTIAL Pattern_Orient 0 Angle_Between_Sides Center_Pattern YES ------------------------------------------------------------------------------------------------------------------------------------ 16088( 7) - 03-Sep-2020 15:51:45 - [ 4] Visit: 01 (AST01) Visit Requirements: BETWEEN 01-APR-2020:00:00:00 AND 10-APR-2020:00:00:00 On Hold Comments: Additional Comments: The five long, dithered exposures are intended to fill a single visibility window to get the relative timing we need. This is a stand-alone visit with a window provided to give a time constraint that is loose but holds it in roughly the right timeframe for the overall temporal sequence needed for the astrometry. Successful observations require a minimum number of suitable Gaia DR2 sources in the full field of UVIS. As the observations are scheduled, the proposal team needs to check potential windows for suitable guide stars and provide guidance on which windows will work best. If the fields are sparse enough, we may need to provide adjusted POSTARG values to ensure there are enough stars. 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 I2-BOROSOV WFC3/UVI ACCUM UVIS F350LP 1 380 S POS TARG 0, 0; SEQ 1 S (1900 S) NON-INT; PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 1 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 2 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 3 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 4 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 5 none none none 1 N/A S 16088( 7) - 03-Sep-2020 15:51:45 - [ 5] Visit: 02 (AST02) Visit Requirements: BETWEEN 01-MAY-2020:00:00:00 AND 10-MAY-2020:00:00:00 On Hold Comments: Additional Comments: The five long, dithered exposures are intended to fill a single visibility window to get the relative timing we need. This is a stand-alone visit with a window provided to give a time constraint that is loose but holds it in roughly the right timeframe for the overall temporal sequence needed for the astrometry. Successful observations require a minimum number of suitable Gaia DR2 sources in the full field of UVIS. As the observations are scheduled, the proposal team needs to check potential windows for suitable guide stars and provide guidance on which windows will work best. If the fields are sparse enough, we may need to provide adjusted POSTARG values to ensure there are enough stars. 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 I2-BOROSOV WFC3/UVI ACCUM UVIS F350LP 1 380 S POS TARG 0, 0; SEQ 1 S (1900 S) NON-INT; PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 1 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 2 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 3 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 4 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 5 none none none 1 N/A S 16088( 7) - 03-Sep-2020 15:51:45 - [ 6] Visit: 03 (AST03) Visit Requirements: BETWEEN 29-MAY-2020:00:00:00 AND 10-JUN-2020:00:00:00 On Hold Comments: Additional Comments: The five long, dithered exposures are intended to fill a single visibility window to get the relative timing we need. This is a stand-alone visit with a window provided to give a time constraint that is loose but holds it in roughly the right timeframe for the overall temporal sequence needed for the astrometry. Successful observations require a minimum number of suitable Gaia DR2 sources in the full field of UVIS. As the observations are scheduled, the proposal team needs to check potential windows for suitable guide stars and provide guidance on which windows will work best. If the fields are sparse enough, we may need to provide adjusted POSTARG values to ensure there are enough stars. 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 I2-BOROSOV WFC3/UVI ACCUM UVIS F350LP 1 380 S POS TARG 0, 0; SEQ 1 S (1900 S) NON-INT; PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 1 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 2 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 3 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 4 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 5 none none none 1 N/A S 16088( 7) - 03-Sep-2020 15:51:45 - [ 7] Visit: 04 (AST04) Visit Requirements: BETWEEN 01-JUL-2020:00:00:00 AND 10-JUL-2020:00:00:00 On Hold Comments: Additional Comments: The five long, dithered exposures are intended to fill a single visibility window to get the relative timing we need. This is a stand-alone visit with a window provided to give a time constraint that is loose but holds it in roughly the right timeframe for the overall temporal sequence needed for the astrometry. Successful observations require a minimum number of suitable Gaia DR2 sources in the full field of UVIS. As the observations are scheduled, the proposal team needs to check potential windows for suitable guide stars and provide guidance on which windows will work best. If the fields are sparse enough, we may need to provide adjusted POSTARG values to ensure there are enough stars. 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 I2-BOROSOV WFC3/UVI ACCUM UVIS F350LP 1 380 S POS TARG 0, 0; SEQ 1 S (1900 S) NON-INT; PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 1 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 2 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 3 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 4 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 5 none none none 1 N/A S 16088( 7) - 03-Sep-2020 15:51:45 - [ 8] Visit: 05 (AST05) Visit Requirements: BETWEEN 25-AUG-2020:00:00:00 AND 07-SEP-2020:00:00:00 On Hold Comments: Additional Comments: The five long, dithered exposures are intended to fill a single visibility window to get the relative timing we need. This is a stand-alone visit with a window provided to give a time constraint that is loose but holds it in roughly the right timeframe for the overall temporal sequence needed for the astrometry. Successful observations require a minimum number of suitable Gaia DR2 sources in the full field of UVIS. As the observations are scheduled, the proposal team needs to check potential windows for suitable guide stars and provide guidance on which windows will work best. If the fields are sparse enough, we may need to provide adjusted POSTARG values to ensure there are enough stars. 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 I2-BOROSOV WFC3/UVI ACCUM UVIS2 F350LP 1 380 S POS TARG 0, 0; SEQ 1 S (1900 S) NON-INT; PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 1 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 2 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 3 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 4 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 5 none none none 1 N/A S 16088( 7) - 03-Sep-2020 15:51:45 - [ 9] Visit: 06 (AST06) Visit Requirements: BETWEEN 26-SEP-2020:00:00:00 AND 05-OCT-2020:00:00:00 On Hold Comments: Additional Comments: The five long, dithered exposures are intended to fill a single visibility window to get the relative timing we need. This is a stand-alone visit with a window provided to give a time constraint that is loose but holds it in roughly the right timeframe for the overall temporal sequence needed for the astrometry. Successful observations require a minimum number of suitable Gaia DR2 sources in the full field of UVIS. As the observations are scheduled, the proposal team needs to check potential windows for suitable guide stars and provide guidance on which windows will work best. If the fields are sparse enough, we may need to provide adjusted POSTARG values to ensure there are enough stars. 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 I2-BOROSOV WFC3/UVI ACCUM UVIS2 F350LP 1 380 S POS TARG 0, 0; SEQ 1 S (1900 S) NON-INT; PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 1 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 2 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 3 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 4 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 5 none none none 1 N/A S 16088( 7) - 03-Sep-2020 15:51:45 - [ 10] Visit: 07 (PlaneX1) Visit Requirements: ORIENT 118D TO 118 D; BETWEEN 30-JUL-2020:16:17:30 AND 31-JUL-2020:16:17:30 On Hold Comments: Additional Comments: The five long, dithered exposures are intended to fill a single visibility window to get the relative timing we need. This visit is timed to be close to the time when our viewpoint is in the orbit plane of the comet to study the dust surrounding the comet but is also used for astrometry. Successful observations require a minimum number of suitable Gaia DR2 sources in the full field of UVIS. As the observations are scheduled, the proposal team needs to check potential windows for suitable guide stars and provide guidance on which windows will work best. If the fields are sparse enough, we may need to provide adjusted POSTARG values to ensure there are enough stars. 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 I2-BOROSOV WFC3/UVI ACCUM UVIS F350LP 1 380 S POS TARG 0, 0; SEQ 1 S (1900 S) NON-INT; PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 1 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 2 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 3 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 4 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 5 none none none 1 N/A S 16088( 7) - 03-Sep-2020 15:51:45 - [ 11] Visit: 08 (PlaneX2) Visit Requirements: ORIENT 118D TO 118 D; AFTER 07 BY 0.8 Orbits TO 1.2 Orbits On Hold Comments: Additional Comments: The five long, dithered exposures are intended to fill a single visibility window to get the relative timing we need. This visit is timed to be close to the time when our viewpoint is in the orbit plane of the comet to study the dust surrounding the comet but is also used for astrometry. It has a relative timing contraint binding it to the previous visit. Ideally, visits 7 and 8 should be done back to back and this is how the timing constraint is written. Successful observations require a minimum number of suitable Gaia DR2 sources in the full field of UVIS. As the observations are scheduled, the proposal team needs to check potential windows for suitable guide stars and provide guidance on which windows will work best. If the fields are sparse enough, we may need to provide adjusted POSTARG values to ensure there are enough stars. 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 I2-BOROSOV WFC3/UVI ACCUM UVIS F350LP 1 380 S POS TARG 0, 0; SEQ 1 S (1900 S) NON-INT; PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 1 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 2 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 3 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 4 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS F350LP 5 none none none 1 N/A S 16088( 7) - 03-Sep-2020 15:51:45 - [ 12] Visit: 09 (PlaneX_post1) Visit Requirements: AFTER 07 BY 2.5 D TO 3.5 D On Hold Comments: Additional Comments: The five long, dithered exposures are intended to fill a single visibility window to get the relative timing we need. This visit is in support of the visit 7 and 8 data which are timed to be close to the time when our viewpoint is in the orbit plane of the comet to study the dust surrounding the comet but is also used for astrometry. Visits 9 and 10 provide rotational context for visits 7 and 8. Successful observations require a minimum number of suitable Gaia DR2 sources in the full field of UVIS. As the observations are scheduled, the proposal team needs to check potential windows for suitable guide stars and provide guidance on which windows will work best. If the fields are sparse enough, we may need to provide adjusted POSTARG values to ensure there are enough stars. 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 I2-BOROSOV WFC3/UVI ACCUM UVIS2 F350LP 1 380 S POS TARG -16, 0; SEQ 1 S (1900 S) NON-INT; PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 1 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 2 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 3 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 4 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 5 none none none 1 N/A S 16088( 7) - 03-Sep-2020 15:51:45 - [ 13] Visit: 10 (PlaneX_post2) Visit Requirements: AFTER 07 BY 4.5 D TO 5.5 D On Hold Comments: Additional Comments: The five long, dithered exposures are intended to fill a single visibility window to get the relative timing we need. This visit is in support of the visit 7 and 8 data which are timed to be close to the time when our viewpoint is in the orbit plane of the comet to study the dust surrounding the comet but is also used for astrometry. Visits 9 and 10 provide rotational context for visits 7 and 8. Successful observations require a minimum number of suitable Gaia DR2 sources in the full field of UVIS. As the observations are scheduled, the proposal team needs to check potential windows for suitable guide stars and provide guidance on which windows will work best. If the fields are sparse enough, we may need to provide adjusted POSTARG values to ensure there are enough stars. 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 I2-BOROSOV WFC3/UVI ACCUM UVIS2 F350LP 1 380 S POS TARG -16, 0; SEQ 1 S (1900 S) NON-INT; PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 1 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 2 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 3 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 4 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 5 none none none 1 N/A S 16088( 7) - 03-Sep-2020 15:51:45 - [ 14] Visit: 11 (AST05 retry) Visit Requirements: BETWEEN 21-SEP-2020:00:00:00 AND 19-OCT-2020:00:00:00 On Hold Comments: Additional Comments: The five long, dithered exposures are intended to fill a single visibility window to get the relative timing we need. This is a stand-alone visit with a window provided to give a time constraint that is loose but holds it in roughly the right timeframe for the overall temporal sequence needed for the astrometry. Successful observations require a minimum number of suitable Gaia DR2 sources in the full field of UVIS. As the observations are scheduled, the proposal team needs to check potential windows for suitable guide stars and provide guidance on which windows will work best. If the fields are sparse enough, we may need to provide adjusted POSTARG values to ensure there are enough stars. This is a repeat of visit 5 due to a guide star failure. The best use of this repeat visit would be to schedule this immediately adjacent to visit 6 which is already scheduled. If that is not possible, the next best thing is to schedule after visit 5 before the object is lost due to the solar exclusion zone. The window is set to all of the remaining time for scheduling in case even our second choice isn't possible. 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 I2-BOROSOV WFC3/UVI ACCUM UVIS2 F350LP 1 380 S POS TARG 0, 0; SEQ 1 S (1900 S) NON-INT; PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 1 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 2 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 3 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 4 none none none 1 N/A S I2-BOROSOV 1 WFC3/UVI ACCUM UVIS2 F350LP 5 none none none 1 N/A S 16088( 7) - 03-Sep-2020 15:51:45 - [ 15] Summary Form for Proposal 16088 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS, UVIS2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 07 BY 0.8 Orbits TO 1.2 Orbits, AFTER 07 BY 2.5 D TO 3.5 D, AFTER 07 BY 4.5 D TO 5.5 D, BETWEEN 01-APR-2020:00:00:00 AND 10-APR-2020:00:00:00, BETWEEN 01-JUL-2020:00:00:00 AND 10-JUL-2020:00:00:00, BETWEEN 01-MAY-2020:00:00:00 AND 10-MAY-2020:00:00:00, BETWEEN 21-SEP-2020:00:00:00 AND 19-OCT-2020:00:00:00, BETWEEN 25-AUG-2020:00:00:00 AND 07-SEP-2020:00:00:00, BETWEEN 26-SEP-2020:00:00:00 AND 05-OCT-2020:00:00:00, BETWEEN 29-MAY-2020:00:00:00 AND 10-JUN-2020:00:00:00, BETWEEN 30-JUL-2020:16:17:30 AND 31-JUL-2020:16:17:30, ORIENT 118D TO 118 D, PATTERN 1 1, POS TARG -16, 0, POS TARG 0, 0, SEQ 1 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F350LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names I2-BOROSOV ------------------------------------------------------------------------------------------------------------------------------------