15248( 3) - 21-Dec-2017 15:22:49 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15248 Version: 3 Check-in Time: 21-Dec-2017 15:22:49 STScI Edit Number: 1 Title A Satellite Search of a Newly Discovered Dwarf Planet ------------------------------------------------------------------------------------ Type Cycle GO 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Scott Sander Sheppard Carnegie Institution of Washington Y CoI: Dr. Chad A. Trujillo Gemini Observatory, Northern Operations N ------------------------------------------------------------------------------------ Abstract All of the largest Kuiper Belt Objects have relatively small, close-in satellites. These satellites are likely produced by direct collisions on the primaries surface and show Earth-Moon forming impacts are likely the norm of planet formation. We recently discovered the ninth intrinsically brightest KBO, 2013 FY27, likely making it one of the top 10 largest KBOs. The largest 15 KBOs have been searched for satellites using HST, with 11 of those found to have satellites. Knowledge of a satellite are important for determining the density and thus internal structure of the KBO as well as its collisional history. 2013 FY27 is extra interesting because its size is likely in the transition region. The largest several KBOs seem to have higher densities than smaller KBOs as well as show abundant signs of water ice and methane ice. In addition, all the KBOs that are likely larger than 2013 FY23 have known satellites, except for Sedna, while the smaller KBOs satellites are not as prevalent. We propose to search for satellites of 2013 FY27 for the first time with deep, high resolution imaging to see if this transition sized dwarf planet has a satellite, which can further constrain its density. ------------------------------------------------------------------------------------ Observations Description ------------------------ Need to observe asteroid 2013 FY27 with multiple images to look for satellites around the object. ------------------------------------------------------------------------------------ 15248( 3) - 21-Dec-2017 15:22:49 - [ 2] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: 2013FY27 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: ASTEROID ASTEROID 2013 FY27 ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 TYPE=ASTEROID, A=58.94485982512065, E=0.3895064721673114, I=33.06956933841344, O=187.0983243598756, W=139.4577723243537, M=208.647199067439, EQUINOX=J2000, EPOCH=07-MAY-2014:00:00:00, EpochTimeScale=TDB ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ANGULAR_RATE 2013FY27 FROM EARTH GT 0.00028 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 22.2 +/- 0.1 Need to observe 2013 FY27 with several images to look for satellites. Want any stars or background sources to move several pixels between first and last image (i.e. from Ephemeris Center: EARTH parallax effect of 2013 FY27) in order to have any Extended: NO background stars move so one can tell if an object is a background source or a satellite moving with 2013 FY27. Thus only want to observe 2013 FY27 within a month or so of opposition when it is moving greater than about 1 arcsecond per hour or 0.00028 arcseconds per second. This would be anytime between mid January 2018 to mid April 2018. ------------------------------------------------------------------------------------------------------------------------------------ 15248( 3) - 21-Dec-2017 15:22:49 - [ 3] Visit: 01 (1) Visit Requirements: PCS MODE FINE; BETWEEN 11-JAN-2018:00:00:00 AND 18-APR-2018:00:00:00 On Hold Comments: Additional Comments: The one and only visit for this program. To get 4 long exposure images in the F350LP filter. 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 2013FY27 WFC3/UVI ACCUM UVIS2-C1K F350LP 1 545 S POS TARG 0.0, 0.0 S 1C-CTE see below (545 S) Comments: Just simply want the main object in the center of the field with no gaps or dead areas near it. ------------------------------------------------------------------------------------------------------------------------------------ 2 2013FY27 WFC3/UVI ACCUM UVIS2-C1K F350LP 1 545 S POS TARG 0.158, 0.070 S 1C-CTE see below (545 S) Comments: Just simply want the main object in the center of the field with no gaps or dead areas near it. ------------------------------------------------------------------------------------------------------------------------------------ 3 2013FY27 WFC3/UVI ACCUM UVIS2-C1K F350LP 1 545 S POS TARG 0.099, 0.165 S 1C-CTE see below (545 S) Comments: Just simply want the main object in the center of the field with no gaps or dead areas near it. ------------------------------------------------------------------------------------------------------------------------------------ 4 2013FY27 WFC3/UVI ACCUM UVIS2-C1K F350LP 1 545 S POS TARG -0.060, 0.095 S 1C-CTE see below (545 S) Comments: Just simply want the main object in the center of the field with no gaps or dead areas near it. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 2013FY27 1 WFC3/UVI ACCUM UVIS2-C1 F350LP none none none none 1 545 S S K1C-CTE 2013FY27 2 WFC3/UVI ACCUM UVIS2-C1 F350LP none none none none 1 545 S S K1C-CTE 2013FY27 3 WFC3/UVI ACCUM UVIS2-C1 F350LP none none none none 1 545 S S K1C-CTE 15248( 3) - 21-Dec-2017 15:22:49 - [ 4] 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 | ------------------------------------------------------------------------------------------------------------------------------------ 2013FY27 4 WFC3/UVI ACCUM UVIS2-C1 F350LP none none none none 1 545 S S K1C-CTE 15248( 3) - 21-Dec-2017 15:22:49 - [ 5] Summary Form for Proposal 15248 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2-C1K1C-CTE ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 11-JAN-2018:00:00:00 AND 18-APR-2018:00:00:00, PCS MODE FINE, POS TARG -0.060, 0.095, POS TARG 0.0, 0.0, POS TARG 0.099, 0.165, POS TARG 0.158, 0.070 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F350LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names 2013FY27 ------------------------------------------------------------------------------------------------------------------------------------