16452( 4) - 04-Dec-2020 22:31:01 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16452 Version: 4 Check-in Time: 04-Dec-2020 22:31:01 STScI Edit Number: 1 Title Is the Lucy Mission Target (52246) Donaldjohanson a Binary? ------------------------------------------------------------------------------------ Type Cycle GO 28 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Keith S. Noll NASA Goddard Space Flight Center Y CoI: Dr. Will M. Grundy Lowell Observatory N CoI: Dr. Stefano Mottola Deutsches Zentrum fur Luft- und Raumfahrt N eV, IfP CoI: Dr. Stephan Hellmich Deutsches Zentrum fur Luft- und Raumfahrt N eV, IfP CoI: Dr. Catherine Olkin Southwest Research Institute N CoI: Dr. Michael E Brown California Institute of Technology N CoI: Dr. Marc W. Buie Southwest Research Institute N ------------------------------------------------------------------------------------ Abstract (52246) Donaldjohanson is a Main Belt asteroid target of opportunity that the Lucy mission will fly by in April 2025. In August 2020 it was revealed to have an exceptionally high amplitude and long period lightcurve. We propose here to test the possibility that this extreme lightcurve is produced by a synchronous binary. Such a system can explain both the amplitude and period with physically reasonable component shapes. The observations will take advantage of the only opportunity prior to 2025 when such a binary could be resolved by HST during the unusually close perihelic opposition in December 2020. The identification of a binary impacts the choice of target acquisition software to be used by the Lucy spacecraft during flyby. ------------------------------------------------------------------------------------ Observations Description ------------------------ Single orbit visit of asteroid (52246) Donaldjohanson in Nov-Dec 2020 when it is less than 1.08 AU from Earth. 9 dithered exposures in each of the F438W and F555W filters. ------------------------------------------------------------------------------------ 16452( 4) - 04-Dec-2020 22:31:01 - [ 2] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: DONALDJOHANSON ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: ASTEROID Main Belt ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 TYPE=ASTEROID, A=2.383408217708659, E=0.1869719367322857, I=4.423713412634814 , O=262.8234180381248, W=213.1874689016715, M=197.7867423053335, EQUINOX=J2000, EPOCH=05-AUG-2019:00:00:00, EpochTimeScale=TDB ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 17.0 +/- 0.6 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 16452( 4) - 04-Dec-2020 22:31:01 - [ 3] Visit: 01 Visit Requirements: BETWEEN 03-DEC-2020:07:12:00 AND 03-DEC-2020:19:12:00; BETWEEN 28-NOV-2020:20:24:00 AND 29-NOV-2020:08:24:00; BETWEEN 08-DEC-2020:19:12:00 AND 09-DEC-2020:07:12:00; BETWEEN 23-NOV-2020:06:00:00 AND 23-NOV-2020:18:00:00; BETWEEN 14-DEC-2020:00:00:00 AND 14-DEC-2020:12:00:00; BETWEEN 19-DEC-2020:07:12:00 AND 19-DEC-2020:19:12:00 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 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 40 S (40 POS TARG 0.0000, 0.0000 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 40 S (40 POS TARG 0.0927, 0.3376 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 40 S (40 POS TARG 0.1851, 0.1978 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 40 S (40 POS TARG 0.2381, 0.5063 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 5 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 40 S (40 POS TARG 0.3305, 0.3665 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 6 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 40 S (40 POS TARG 0.4232, 0.6644 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 7 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 40 S (40 POS TARG 0.4760, 0.5352 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 8 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 40 S (40 POS TARG 0.5687, 0.8331 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 9 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 40 S (40 POS TARG 0.6610, 0.6933 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 10 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 20 S (20 POS TARG 0.0000, 0.0000 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 11 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 20 S (20 POS TARG 0.0927, 0.3376 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 12 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 20 S (20 POS TARG 0.1851, 0.1978 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 13 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 20 S (20 POS TARG 0.2381, 0.5063 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 16452( 4) - 04-Dec-2020 22:31:01 - [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 14 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 20 S (20 POS TARG 0.3305, 0.3665 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 15 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 20 S (20 POS TARG 0.4232, 0.6644 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 16 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 20 S (20 POS TARG 0.4760, 0.5352 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 17 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 20 S (20 POS TARG 0.5687, 0.8331 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 18 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 20 S (20 POS TARG 0.6610, 0.6933 SON S 2C-SUB 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 | ------------------------------------------------------------------------------------------------------------------------------------ DONALDJOHANSON 1 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 2 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 3 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 4 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 5 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 6 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 7 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 8 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 9 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 10 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 11 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 12 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 13 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB 16452( 4) - 04-Dec-2020 22:31:01 - [ 5] 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 | ------------------------------------------------------------------------------------------------------------------------------------ DONALDJOHANSON 14 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 15 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 16 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 17 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 18 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB 16452( 4) - 04-Dec-2020 22:31:01 - [ 6] Visit: 51 Visit Requirements: BETWEEN 03-DEC-2020:07:12:00 AND 03-DEC-2020:19:12:00; BETWEEN 28-NOV-2020:20:24:00 AND 29-NOV-2020:08:24:00; BETWEEN 08-DEC-2020:19:12:00 AND 09-DEC-2020:07:12:00; BETWEEN 23-NOV-2020:06:00:00 AND 23-NOV-2020:18:00:00; BETWEEN 14-DEC-2020:00:00:00 AND 14-DEC-2020:12:00:00; BETWEEN 19-DEC-2020:07:12:00 AND 19-DEC-2020:19:12:00; BETWEEN 24-DEC-2020:19:12:00 AND 25-DEC-2020:09:12:00; BETWEEN 29-DEC-2020:23:24:00 AND 30-DEC-2020:11:24:00; BETWEEN 04-JAN-2021:07:20:00 AND 04-JAN-2021:19:20:00; BETWEEN 09-JAN-2021:10:00:00 AND 09-JAN-2021:22:00:00 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 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 60 S (60 POS TARG 0.0000, 0.0000 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 60 S (60 POS TARG 0.0927, 0.3376 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 3 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 60 S (60 POS TARG 0.1851, 0.1978 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 4 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 60 S (60 POS TARG 0.2381, 0.5063 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 5 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 60 S (60 POS TARG 0.3305, 0.3665 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 6 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 60 S (60 POS TARG 0.4232, 0.6644 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 7 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 60 S (60 POS TARG 0.4760, 0.5352 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 8 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 60 S (60 POS TARG 0.5687, 0.8331 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 9 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F438W FLASH=11 1 60 S (60 POS TARG 0.6610, 0.6933 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 10 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 30 S (30 POS TARG 0.0000, 0.0000 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 11 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 30 S (30 POS TARG 0.0927, 0.3376 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 12 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 30 S (30 POS TARG 0.1851, 0.1978 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 16452( 4) - 04-Dec-2020 22:31:01 - [ 7] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 13 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 30 S (30 POS TARG 0.2381, 0.5063 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 14 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 30 S (30 POS TARG 0.3305, 0.3665 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 15 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 30 S (30 POS TARG 0.4232, 0.6644 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 16 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 30 S (30 POS TARG 0.4760, 0.5352 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 17 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 30 S (30 POS TARG 0.5687, 0.8331 SON S 2C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 18 DONALDJOHAN WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=11 1 30 S (30 POS TARG 0.6610, 0.6933 SON S 2C-SUB 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 | ------------------------------------------------------------------------------------------------------------------------------------ DONALDJOHANSON 1 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 2 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 3 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 4 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 5 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 6 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 7 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 8 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 9 WFC3/UVI ACCUM UVIS2-C5 F438W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 10 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 11 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB 16452( 4) - 04-Dec-2020 22:31:01 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ DONALDJOHANSON 12 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 13 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 14 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 15 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 16 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 17 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB DONALDJOHANSON 18 WFC3/UVI ACCUM UVIS2-C5 F555W none none none none 1 N/A S 12C-SUB 16452( 4) - 04-Dec-2020 22:31:01 - [ 9] Summary Form for Proposal 16452 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2-C512C-SUB ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=11 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 03-DEC-2020:07:12:00 AND 03-DEC-2020:19:12:00, BETWEEN 04-JAN-2021:07:20:00 AND 04-JAN-2021:19:20:00, BETWEEN 08-DEC-2020:19:12:00 AND 09-DEC-2020:07:12:00, BETWEEN 09-JAN-2021:10:00:00 AND 09-JAN-2021:22:00:00, BETWEEN 14-DEC-2020:00:00:00 AND 14-DEC-2020:12:00:00, BETWEEN 19-DEC-2020:07:12:00 AND 19-DEC-2020:19:12:00, BETWEEN 23-NOV-2020:06:00:00 AND 23-NOV-2020:18:00:00, BETWEEN 24-DEC-2020:19:12:00 AND 25-DEC-2020:09:12:00, BETWEEN 28-NOV-2020:20:24:00 AND 29-NOV-2020:08:24:00, BETWEEN 29-DEC-2020:23:24:00 AND 30-DEC-2020:11:24:00, POS TARG 0.0000, 0.0000, POS TARG 0.0927, 0.3376, POS TARG 0.1851, 0.1978, POS TARG 0.2381, 0.5063, POS TARG 0.3305, 0.3665, POS TARG 0.4232, 0.6644, POS TARG 0.4760, 0.5352, POS TARG 0.5687, 0.8331, POS TARG 0.6610, 0.6933 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F438W, F555W ------------------------------------------------------------------------------------------------------------------------------------ Target Names DONALDJOHANSON ------------------------------------------------------------------------------------------------------------------------------------