17403( 6) - 30-Oct-2025 21:18:16 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17403 Version: 6 Check-in Time: 30-Oct-2025 21:18:16 STScI Edit Number: 2 Title Astrometric search for Planets orbiting the closest Y Dwarf ------------------------------------------------------------------------------------ Type Cycle GO 31 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Luigi R. Bedin INAF - Osservatorio Astronomico di Padova Y CoI: Prof. Adam J. Burgasser University of California - San Diego N CoI: Prof. Daniel Apai University of Arizona N CoI: Dr. Clemence Fontanive University of Edinburgh, Institute for N Astronomy ------------------------------------------------------------------------------------ Abstract Located at 2.2 pc, the ~250K Y2 (sub-)brown dwarf WISE J085510.83-071442.5 is the fourth closest known system to Earth. Studying this object provides unique insights into brown dwarf (and exoplanet) atmospheric properties, thermal evolution, multiplicity, and planet-hosting prospects. We propose to use HST to obtain one the most accurate annual parallax of this - or any - planetary-mass brown dwarf to date, achieving an unprecedented accuracy of 200 micro-arcseconds, and constraining its absolute space motion to equivalent accuracy. More importantly, we will be able to search for faint companions co-moving with the target, either resolved or through astrometric perturbations of its linear motion, the latter probing down to a few Earth masses. HST is the optimal facility for precision astrometric measurement of WISE 0855-0714, as this source is too cool and faint at optical and near-infrared wavelengths to observe with ground-based facilities or Gaia. Our observations will improve current astrometric precision of this source by a factor of 40 and anchor future JWST measurements of this and other cold brown dwarfs, while providing high-precision distance and motion measurements and tight constraints on planetary-mass companions for one of the closest ``stellar object'' to the Sun. ------------------------------------------------------------------------------------ Observations Description ------------------------ This is an astrometric project. ------------------------------------------------------------------------------------ 17403( 6) - 30-Oct-2025 21:18:16 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 WISEA-J08551 STAR, BROWN DWARF RA=08H55M10.8317S, J2000 V = 25 +/- 0.5 H 0.74-071442. DEC=-07D14'42.53" 5 Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 -0.5456164006073517 0.6792999999999999 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 3 WISEA-J0855Y STAR, BROWN DWARF RA=08H55M2.9956S, J2000 V = 25 H EAR2024.8517 DEC=-07D14'32.77" Reference Frame: ICRS Comments: position calculated by me at epoch 2024.8517 because I do not understand how the APT moving target works ------------------------------------------------------------------------------------------------------------------------------------ 4 WISEA-J0855Y STAR, BROWN DWARF RA=08H55M2.4481S, J2000 V = 25 H EAR2025.8542 DEC=-07D14'32.10" Reference Frame: ICRS Comments: position calculated by me at epoch 2025.8542 because I do not understand how the APT moving target works ------------------------------------------------------------------------------------------------------------------------------------ 17403( 6) - 30-Oct-2025 21:18:16 - [ 3] Visit: 03 (01) Visit Requirements: SCHED 70%; BETWEEN 06-NOV-2024:00:00:00 AND 13-NOV-2024:00:00:00 On Hold Comments: Additional Comments: around Nov 9th, 2024 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 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=RAPID, NSAMP=7 1 DEF POS TARG -19, +19; GS 10.74-07144 CUM (20.526 S) ACQ SCENARIO BASE1O3 2.5 ------------------------------------------------------------------------------------------------------------------------------------ 2 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG -19, +19 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG -20, -1 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG -21, -21 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG +1, +20 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG +0, +0 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=RAPID, NSAMP=7 1 DEF POS TARG -1, -20 10.74-07144 CUM (20.526 S) 2.5 ------------------------------------------------------------------------------------------------------------------------------------ 8 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG -1, -20 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG +19, +21 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 10 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG +20, +0 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 17403( 6) - 30-Oct-2025 21:18:16 - [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 11 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG +21, -19 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG -1, +1 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 13 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=RAPID, NSAMP=7 1 DEF POS TARG -1, +1 10.74-07144 CUM (20.526 S) 2.5 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ WISEA-J085510.74-07 1 WFC3/IR MULTIAC IR F160W none none none none 1 N/A 1442.5 CUM WISEA-J085510.74-07 2 WFC3/IR MULTIAC IR F160W none none none none 1 N/A 1442.5 CUM WISEA-J085510.74-07 3 WFC3/IR MULTIAC IR F160W none none none none 1 N/A 1442.5 CUM WISEA-J085510.74-07 4 WFC3/IR MULTIAC IR F160W none none none none 1 N/A 1442.5 CUM WISEA-J085510.74-07 5 WFC3/IR MULTIAC IR F160W none none none none 1 N/A 1442.5 CUM WISEA-J085510.74-07 6 WFC3/IR MULTIAC IR F160W none none none none 1 N/A 1442.5 CUM WISEA-J085510.74-07 7 WFC3/IR MULTIAC IR F160W none none none none 2 N/A 1442.5 CUM WISEA-J085510.74-07 8 WFC3/IR MULTIAC IR F160W none none none none 2 N/A 1442.5 CUM WISEA-J085510.74-07 9 WFC3/IR MULTIAC IR F160W none none none none 2 N/A 1442.5 CUM WISEA-J085510.74-07 10 WFC3/IR MULTIAC IR F160W none none none none 2 N/A 1442.5 CUM WISEA-J085510.74-07 11 WFC3/IR MULTIAC IR F160W none none none none 2 N/A 1442.5 CUM WISEA-J085510.74-07 12 WFC3/IR MULTIAC IR F160W none none none none 2 N/A 1442.5 CUM WISEA-J085510.74-07 13 WFC3/IR MULTIAC IR F160W none none none none 2 N/A 1442.5 CUM 17403( 6) - 30-Oct-2025 21:18:16 - [ 5] Visit: 04 (02) Visit Requirements: SCHED 70%; BETWEEN 06-NOV-2025:00:00:00 AND 13-NOV-2025:00:00:00 On Hold Comments: Additional Comments: around May 10th, 2025 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 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=RAPID, NSAMP=7 1 DEF POS TARG -19, +19; GS 10.74-07144 CUM (20.526 S) ACQ SCENARIO BASE1O3 2.5 ------------------------------------------------------------------------------------------------------------------------------------ 2 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG -19, +19 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG -20, -1 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG -21, -21 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG +1, +20 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG +0, +0 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=RAPID, NSAMP=7 1 DEF POS TARG -1, -20 10.74-07144 CUM (20.526 S) 2.5 ------------------------------------------------------------------------------------------------------------------------------------ 8 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG -1, -20 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG +19, +21 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 10 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG +20, +0 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 17403( 6) - 30-Oct-2025 21:18:16 - [ 6] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 11 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG +21, -19 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG -1, +1 10.74-07144 CUM (399.233 2.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 13 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=RAPID, NSAMP=7 1 DEF POS TARG -1, +1 10.74-07144 CUM (20.526 S) 2.5 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ WISEA-J085510.74-07 1 WFC3/IR MULTIAC IR F160W none none none none 1 N/A 1442.5 CUM WISEA-J085510.74-07 2 WFC3/IR MULTIAC IR F160W none none none none 1 N/A 1442.5 CUM WISEA-J085510.74-07 3 WFC3/IR MULTIAC IR F160W none none none none 1 N/A 1442.5 CUM WISEA-J085510.74-07 4 WFC3/IR MULTIAC IR F160W none none none none 1 N/A 1442.5 CUM WISEA-J085510.74-07 5 WFC3/IR MULTIAC IR F160W none none none none 1 N/A 1442.5 CUM WISEA-J085510.74-07 6 WFC3/IR MULTIAC IR F160W none none none none 1 N/A 1442.5 CUM WISEA-J085510.74-07 7 WFC3/IR MULTIAC IR F160W none none none none 2 N/A 1442.5 CUM WISEA-J085510.74-07 8 WFC3/IR MULTIAC IR F160W none none none none 2 N/A 1442.5 CUM WISEA-J085510.74-07 9 WFC3/IR MULTIAC IR F160W none none none none 2 N/A 1442.5 CUM WISEA-J085510.74-07 10 WFC3/IR MULTIAC IR F160W none none none none 2 N/A 1442.5 CUM WISEA-J085510.74-07 11 WFC3/IR MULTIAC IR F160W none none none none 2 N/A 1442.5 CUM WISEA-J085510.74-07 12 WFC3/IR MULTIAC IR F160W none none none none 2 N/A 1442.5 CUM WISEA-J085510.74-07 13 WFC3/IR MULTIAC IR F160W none none none none 2 N/A 1442.5 CUM 17403( 6) - 30-Oct-2025 21:18:16 - [ 7] Visit: 05 (05) Visit Requirements: SCHED 70%; BETWEEN 06-NOV-2025:00:00:00 AND 13-NOV-2025:00:00:00 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 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=RAPID, NSAMP=7 1 DEF POS TARG -19, +19; GS YEAR2025.85 CUM (20.526 S) ACQ SCENARIO BASE1O3 42 ------------------------------------------------------------------------------------------------------------------------------------ 2 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG -19, +19 YEAR2025.85 CUM (399.233 42 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG -20, -1 YEAR2025.85 CUM (399.233 42 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG -21, -21 YEAR2025.85 CUM (399.233 42 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG +1, +20 YEAR2025.85 CUM (399.233 42 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG +0, +0 YEAR2025.85 CUM (399.233 42 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=RAPID, NSAMP=7 1 DEF POS TARG -1, -20 YEAR2025.85 CUM (20.526 S) 42 ------------------------------------------------------------------------------------------------------------------------------------ 8 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG -1, -20 YEAR2025.85 CUM (399.233 42 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG +19, +21 YEAR2025.85 CUM (399.233 42 S) ------------------------------------------------------------------------------------------------------------------------------------ 10 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG +20, +0 YEAR2025.85 CUM (399.233 42 S) ------------------------------------------------------------------------------------------------------------------------------------ 17403( 6) - 30-Oct-2025 21:18:16 - [ 8] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 11 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG +21, -19 YEAR2025.85 CUM (399.233 42 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=13 1 DEF POS TARG -1, +1 YEAR2025.85 CUM (399.233 42 S) ------------------------------------------------------------------------------------------------------------------------------------ 13 WISEA-J0855 WFC3/IR MULTIAC IR F160W SAMP-SEQ=RAPID, NSAMP=7 1 DEF POS TARG -1, +1 YEAR2025.85 CUM (20.526 S) 42 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ WISEA-J0855YEAR2025 1 WFC3/IR MULTIAC IR F160W none none none none 1 N/A .8542 CUM WISEA-J0855YEAR2025 2 WFC3/IR MULTIAC IR F160W none none none none 1 N/A .8542 CUM WISEA-J0855YEAR2025 3 WFC3/IR MULTIAC IR F160W none none none none 1 N/A .8542 CUM WISEA-J0855YEAR2025 4 WFC3/IR MULTIAC IR F160W none none none none 1 N/A .8542 CUM WISEA-J0855YEAR2025 5 WFC3/IR MULTIAC IR F160W none none none none 1 N/A .8542 CUM WISEA-J0855YEAR2025 6 WFC3/IR MULTIAC IR F160W none none none none 1 N/A .8542 CUM WISEA-J0855YEAR2025 7 WFC3/IR MULTIAC IR F160W none none none none 2 N/A .8542 CUM WISEA-J0855YEAR2025 8 WFC3/IR MULTIAC IR F160W none none none none 2 N/A .8542 CUM WISEA-J0855YEAR2025 9 WFC3/IR MULTIAC IR F160W none none none none 2 N/A .8542 CUM WISEA-J0855YEAR2025 10 WFC3/IR MULTIAC IR F160W none none none none 2 N/A .8542 CUM WISEA-J0855YEAR2025 11 WFC3/IR MULTIAC IR F160W none none none none 2 N/A .8542 CUM WISEA-J0855YEAR2025 12 WFC3/IR MULTIAC IR F160W none none none none 2 N/A .8542 CUM WISEA-J0855YEAR2025 13 WFC3/IR MULTIAC IR F160W none none none none 2 N/A .8542 CUM 17403( 6) - 30-Oct-2025 21:18:16 - [ 9] Summary Form for Proposal 17403 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=13, NSAMP=7, SAMP-SEQ=RAPID, SAMP-SEQ=STEP50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 06-NOV-2024:00:00:00 AND 13-NOV-2024:00:00:00, BETWEEN 06-NOV-2025:00:00:00 AND 13-NOV-2025:00:00:00, GS ACQ SCENARIO BASE1O3, POS TARG +0, +0, POS TARG +1, +20, POS TARG +19, +21, POS TARG +20, +0, POS TARG +21, -19, POS TARG -1, +1, POS TARG -1, -20, POS TARG -19, +19, POS TARG -20, -1, POS TARG -21, -21, SCHED 70% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W ------------------------------------------------------------------------------------------------------------------------------------ Target Names WISEA-J085510.74-071442.5, WISEA-J0855YEAR2025.8542 ------------------------------------------------------------------------------------------------------------------------------------