13936( 13) - 08-Oct-2014 20:33:52 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13936 Version: 13 Check-in Time: 08-Oct-2014 20:33:52 STScI Edit Number: 10 Title Hubble Heritage imaging of Mars during the Comet Siding Spring encounter ------------------------------------------------------------------------------------ Type Cycle GO/DD 21 ------------------------------------------------------------------------------------ Investigators Contact? PI: Mr. Zolt Levay Space Telescope Science Institute Y CoI: Dr. Keith S. Noll NASA Goddard Space Flight Center Y CoI: Max Mutchler Space Telescope Science Institute Y CoI: Ms. Lisa Frattare Space Telescope Science Institute N CoI: Ms. Jennifer Mack Space Telescope Science Institute Y CoI: Ms. Shelly L. Meyett Space Telescope Science Institute Y CoI: Dr. Carol Christian Space Telescope Science Institute N CoI: Dr. Mario Livio Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract On Oct 19 2014, circa 18:30 UT, dynamically new Oort Cloud comet C/2013 A1 (Siding Spring) will fly within 138, 000 km of the planet Mars. This distance is so small (1/3 the mean Earth-Moon distance, and 10 times closer than any comet has approached the Earth in the modern spaceflight era) that Mars will be moving through the comet's outer atmosphere, or coma, carrying Mars, and its orbiting and ground based roving spacecraft fleet with it. In this way the Mars fleet will be participating in a close comet flyby. This program to image Mars will work in concert with several other HST programs imaging the comet during this encounter. ------------------------------------------------------------------------------------ Observations Description ------------------------ This one-orbit visit could fill any otherwise unscheduled holes in the sequence of Comet Siding Spring observations during the Mars encounter on 19-20 Oct 2014. We will obtain a series of moving-target subarray images of Mars. With WFC3 we mostly alternate between the F410M and F673N filters, with some hedging on exposure times. But we also get a small sweep of other filters. Then to complement John Clarke's related program 13795 we obtain ACS/SBC exposures at the end of the orbit, when the sky is not too bright from direct sunlight. We understand the guide star acquisition required to go from WFC3 to ACS in the middle of the orbit is an overhead hit, but this gives us all the optical imaging we want with WFC3, and also complements the rest of the 22-orbit Mars / Comet Siding Spring HST observing campaign best. ------------------------------------------------------------------------------------ 13936( 13) - 08-Oct-2014 20:33:52 - [ 2] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: MARS-WFC3 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: PLANET Mars during the Comet Siding Spring encounter ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=MARS ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = -0.9 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 3 TARGET NAME: MARS-ACS-SBC ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: PLANET Planet Mars ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=MARS TYPE=POS_ANGLE, RAD=13, ANG=320, REF=NORTH ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 0.8 +/- .3 Offset Mars disc to corner of ACS/SBC field of view to UV emission line fluxes are given in the text. image extended H Lyman alpha coronal emission Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 13936( 13) - 08-Oct-2014 20:33:52 - [ 3] Visit: 22 Visit Requirements: ORIENT 93D TO 95 D; BETWEEN 19-OCT-2014:02:00:00 AND 19-OCT-2014:04:00:00 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 MARS-WFC3 WFC3/UVI ACCUM UVIS2-C51 F673N 1 0.5 S (0.5 POS TARG 1, -1; GS ACQ S 2C-SUB S) SCENARIO BASE1B3 ------------------------------------------------------------------------------------------------------------------------------------ 2 MARS-WFC3 WFC3/UVI ACCUM UVIS2-C51 F410M 1 1.5 S (1.5 POS TARG 1, -1 S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 MARS-WFC3 WFC3/UVI ACCUM UVIS2-C51 F673N 1 0.7 S (0.7 POS TARG 1, -1 S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 MARS-WFC3 WFC3/UVI ACCUM UVIS2-C51 F410M 1 2.0 S (2 POS TARG 1, -1 S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 5 MARS-WFC3 WFC3/UVI ACCUM UVIS2-C51 F673N 1 0.8 S (0.8 POS TARG -1, -1 S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 6 MARS-WFC3 WFC3/UVI ACCUM UVIS2-C51 F410M 1 2.5 S (2.5 POS TARG -1, -1 S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 7 MARS-WFC3 WFC3/UVI ACCUM UVIS2-C51 F673N 1 0.9 S (0.9 POS TARG -1, -1 S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 8 MARS-WFC3 WFC3/UVI ACCUM UVIS2-C51 F410M 1 3.0 S (3 POS TARG -1, -1 S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 9 MARS-WFC3 WFC3/UVI ACCUM UVIS2-C51 F467M 1 1.2 S (1.2 POS TARG 1, 1 S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 10 MARS-WFC3 WFC3/UVI ACCUM UVIS2-C51 F502N 1 5.0 S (5 POS TARG 1, 1 S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 11 MARS-WFC3 WFC3/UVI ACCUM UVIS2-C51 F631N 1 0.7 S (0.7 POS TARG 1, 1 S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 12 MARS-WFC3 WFC3/UVI ACCUM UVIS2-C51 F953N 1 3.5 S (3.5 POS TARG 1, 1 S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 13 MARS-WFC3 WFC3/UVI ACCUM UVIS2-C51 F410M 1 2.0 S (2 POS TARG -1, 1 S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 14 MARS-WFC3 WFC3/UVI ACCUM UVIS2-C51 F673N 1 0.7 S (0.7 POS TARG -1, 1 S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 13936( 13) - 08-Oct-2014 20:33:52 - [ 4] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 15 MARS-ACS-SB ACS/SBC ACCUM SBC-FIX F115LP 7 98 S (686 GS ACQ SCENARIO SINGLE C 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 | ------------------------------------------------------------------------------------------------------------------------------------ MARS-WFC3 1 WFC3/UVI ACCUM UVIS2-C5 F673N none none none none 1 N/A S 12C-SUB MARS-WFC3 2 WFC3/UVI ACCUM UVIS2-C5 F410M none none none none 1 N/A S 12C-SUB MARS-WFC3 3 WFC3/UVI ACCUM UVIS2-C5 F673N none none none none 1 N/A S 12C-SUB MARS-WFC3 4 WFC3/UVI ACCUM UVIS2-C5 F410M none none none none 1 N/A S 12C-SUB MARS-WFC3 5 WFC3/UVI ACCUM UVIS2-C5 F673N none none none none 1 N/A S 12C-SUB MARS-WFC3 6 WFC3/UVI ACCUM UVIS2-C5 F410M none none none none 1 N/A S 12C-SUB MARS-WFC3 7 WFC3/UVI ACCUM UVIS2-C5 F673N none none none none 1 N/A S 12C-SUB MARS-WFC3 8 WFC3/UVI ACCUM UVIS2-C5 F410M none none none none 1 N/A S 12C-SUB MARS-WFC3 9 WFC3/UVI ACCUM UVIS2-C5 F467M none none none none 1 N/A S 12C-SUB MARS-WFC3 10 WFC3/UVI ACCUM UVIS2-C5 F502N none none none none 1 N/A S 12C-SUB MARS-WFC3 11 WFC3/UVI ACCUM UVIS2-C5 F631N none none none none 1 N/A S 12C-SUB MARS-WFC3 12 WFC3/UVI ACCUM UVIS2-C5 F953N none none none none 1 N/A S 12C-SUB MARS-WFC3 13 WFC3/UVI ACCUM UVIS2-C5 F410M none none none none 1 N/A S 12C-SUB MARS-WFC3 14 WFC3/UVI ACCUM UVIS2-C5 F673N none none none none 1 N/A S 12C-SUB MARS-ACS-SBC 15 ACS/SBC ACCUM SBC-FIX F115LP none none 1 none 1 N/A MARS-ACS-SBC 15 ACS/SBC ACCUM SBC-FIX F115LP none none 2 none 1 N/A MARS-ACS-SBC 15 ACS/SBC ACCUM SBC-FIX F115LP none none 3 none 1 N/A MARS-ACS-SBC 15 ACS/SBC ACCUM SBC-FIX F115LP none none 4 none 1 N/A MARS-ACS-SBC 15 ACS/SBC ACCUM SBC-FIX F115LP none none 5 none 1 N/A MARS-ACS-SBC 15 ACS/SBC ACCUM SBC-FIX F115LP none none 6 none 1 N/A MARS-ACS-SBC 15 ACS/SBC ACCUM SBC-FIX F115LP none none 7 none 1 N/A 13936( 13) - 08-Oct-2014 20:33:52 - [ 5] Summary Form for Proposal 13936 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures SBC-FIX, UVIS2-C512C-SUB ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/SBC, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 19-OCT-2014:02:00:00 AND 19-OCT-2014:04:00:00, GS ACQ SCENARIO BASE1B3, GS ACQ SCENARIO SINGLE, ORIENT 93D TO 95 D, POS TARG -1, -1, POS TARG -1, 1, POS TARG 1, -1, POS TARG 1, 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F115LP, F410M, F467M, F502N, F631N, F673N, F953N ------------------------------------------------------------------------------------------------------------------------------------ Target Names MARS-ACS-SBC, MARS-WFC3 ------------------------------------------------------------------------------------------------------------------------------------