13663( 6) - 06-Oct-2014 11:57:14 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13663 Version: 6 Check-in Time: 06-Oct-2014 11:57:14 STScI Edit Number: 2 Title Precise Orbit Determination for a New Horizons KBO ------------------------------------------------------------------------------------ Type Cycle GO 22 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Susan D. Benecchi Planetary Science Institute Y CoI: Dr. Marc W. Buie Southwest Research Institute N CoI: Dr. John R. Spencer Southwest Research Institute N CoI: Dr. S. Alan Stern Southwest Research Institute N CoI: Dr. Keith S. Noll NASA Goddard Space Flight Center N CoI: Dr. Harold A. Weaver The Johns Hopkins University Applied N Physics Laboratory ------------------------------------------------------------------------------------ Abstract The New Horizons (NH) spacecraft will flyby the Pluto system next summer, after this the spacecraft will be retargeted to one or more Kuiper Belt Objects (KBOs) to learn about the remnant material from our outer solar system's formation. We are actively carrying out dedicated ground-based observations to identify a target for NH to flyby and continue to improve our analysis algorithms. To date, we have 52 discoveries including five objects that are long-range reconnaissance candidates, and two that current orbit predictions require about a factor of 2 more propellant than is available for the encounter maneuver. Our searches are continuing in to 2014 and we anticipate as many as 2 objects that will require high precision HST imaging. Unfortunately, NH's trajectory line of site is within the galactic center (Sagittarius) making stellar confusion a major problem in recovering these objects from the ground to obtain precise astrometry and high precision orbits. HST's sensitivity, resolution and PSF stability are crucial components for the success of the NH Kuiper belt mission component. We are requesting 4 TOO orbits to be triggered when a candidate object is found within the targetable region. These observations will provide the required high precision astrometry required for targeting, will evaluate if the NH candidate is binary (~30%) and will make a preliminary color determination to assist in long or short range encounter planning. ------------------------------------------------------------------------------------ Observations Description ------------------------ We obtain 5-370 second exposures in the F350LP filter using a line dither pattern to obtain astrometric measurements for a faint NH candidate object.The orbits are scheduled in pairs so that images can be co-added to meet the depth requirement and the pairs separated by days to meet the orbit extension requirements to determine targetability. Colors as described in the abstract have been set asside because the astrometric need is greater and the object is fainter than originally expected. ------------------------------------------------------------------------------------ 13663( 6) - 06-Oct-2014 11:57:14 - [ 2] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: KBO-G1 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE NH-KBO ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 TYPE=ASTEROID, A=46.405608921901, E=0.26388505198582, I=4.1466231993107, O=136.00700117810, W=49.426808689232, M=64.734133299721, EQUINOX=J2000, EPOCH=20-AUG-2014:00:00:00, EpochTimeScale=UTC ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 26.4 +/- 0.4 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 13663( 6) - 06-Oct-2014 11:57:14 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type LINE Pattern_Purpose OTHER Number_Of_Points 5 Point_Spacing 0.75 Line_Spacing Coordinate_Frame CELESTIAL Pattern_Orient 0 Angle_Between_Sides Center_Pattern YES ------------------------------------------------------------------------------------------------------------------------------------ 13663( 6) - 06-Oct-2014 11:57:14 - [ 4] Visit: 01 Visit Requirements: SCHED 100%; BETWEEN 15-OCT-2014:00:00:00 AND 18-OCT-2014:00:00:00 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 KBO-G1 WFC3/UVI ACCUM UVIS2 F350LP 1 370.0 S PATTERN 1 1 S (1850 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 | ------------------------------------------------------------------------------------------------------------------------------------ KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 1 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 2 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 3 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 4 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 5 none none none 1 N/A S 13663( 6) - 06-Oct-2014 11:57:14 - [ 5] Visit: 02 Visit Requirements: SCHED 100%; AFTER 01 BY 0.9 Orbits TO 1.3 Orbits; SEQ 01, 02 WITHIN 1.1 Orbits 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 KBO-G1 WFC3/UVI ACCUM UVIS2 F350LP 1 370.0 S PATTERN 1 1 S (1850 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 | ------------------------------------------------------------------------------------------------------------------------------------ KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 1 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 2 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 3 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 4 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 5 none none none 1 N/A S 13663( 6) - 06-Oct-2014 11:57:14 - [ 6] Visit: 03 Visit Requirements: SCHED 100%; BETWEEN 22-OCT-2014:00:00:00 AND 25-OCT-2014:00:00:00 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 KBO-G1 WFC3/UVI ACCUM UVIS2 F350LP 1 370.0 S PATTERN 1 1 S (1850 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 | ------------------------------------------------------------------------------------------------------------------------------------ KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 1 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 2 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 3 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 4 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 5 none none none 1 N/A S 13663( 6) - 06-Oct-2014 11:57:14 - [ 7] Visit: 04 Visit Requirements: SCHED 100%; AFTER 03 BY 0.9 Orbits TO 1.3 Orbits; SEQ 03, 04 WITHIN 1.1 Orbits 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 KBO-G1 WFC3/UVI ACCUM UVIS2 F350LP 1 370.0 S PATTERN 1 1 S (1850 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 | ------------------------------------------------------------------------------------------------------------------------------------ KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 1 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 2 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 3 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 4 none none none 1 N/A S KBO-G1 1 WFC3/UVI ACCUM UVIS2 F350LP 5 none none none 1 N/A S 13663( 6) - 06-Oct-2014 11:57:14 - [ 8] Summary Form for Proposal 13663 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 0.9 Orbits TO 1.3 Orbits, AFTER 03 BY 0.9 Orbits TO 1.3 Orbits, BETWEEN 15-OCT-2014:00:00:00 AND 18-OCT-2014:00:00:00, BETWEEN 22-OCT-2014:00:00:00 AND 25-OCT-2014:00:00:00, PATTERN 1 1, SCHED 100%, SEQ 01, 02 WITHIN 1.1 Orbits, SEQ 03, 04 WITHIN 1.1 Orbits ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F350LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names KBO-G1 ------------------------------------------------------------------------------------------------------------------------------------