******************************************************************************* JPL/HORIZONS 16 Psyche (A852 FA) 2025-Dec-12 17:49:18 Rec #: 16 (+COV) Soln.date: 2025-Feb-06_14:15:44 # obs: 7401 (1984-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457856.5 ! 2017-Apr-13.00 (TDB) Residual RMS= .1514 EC= .1354428631790678 QR= 2.527888467382581 TP= 2457129.4685003939 OM= 150.2750236911914 W= 227.3612622931746 IN= 3.098574197998143 A= 2.923911398936447 MA= 143.3213825593065 ADIST= 3.319934330490313 PER= 4.99982 N= .197132287 ANGMOM= .029143589 DAN= 3.16021 DDN= 2.62907 L= 17.5945124 B= -2.2789228 MOID= 1.53169 TP= 2015-Apr-16.9685003939 Asteroid physical parameters (km, seconds, rotational period in hours): GM= 1.601 RAD= 111. ROTPER= 4.196 H= 6.2 G= .200 B-V= .729 ALBEDO= .1203 STYP= X ASTEROID comments: 1: soln ref.= JPL#92, OCC=0 2: source=ORB ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 17:49:19 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: 16 Psyche (A852 FA) {source: JPL#92} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2024-Jul-29 00:00:00.0000 UT Stop time : A.D. 2024-Aug-12 00:00:00.0000 UT Step-size : 60 steps ******************************************************************************* Target pole/equ : IAU {East-longitude positive} Target radii : 139.0, 119.0, 85.5 km {Equator_a, b, pole_c} Center geodetic : 0.0, 0.0, -6378.137 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 0.0, 0.0, 0.0 {E-lon(deg),Dxy(km),Dz(km)} Center pole/equ : ITRF93 {East-longitude positive} Center radii : 6378.137, 6378.137, 6356.752 km {Equator_a, b, pole_c} Target primary : Sun Vis. interferer : MOON (R_eq= 1737.400) km {source: DE441} Rel. light bend : Sun {source: DE441} Rel. lght bnd GM: 1.3271E+11 km^3/s^2 Small-body perts: Yes {source: SB441-N16} Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL Calendar mode : Mixed Julian/Gregorian EOP file : eop.251212.p260310 EOP coverage : DATA-BASED 1962-JAN-20 TO 2025-DEC-12. PREDICTS-> 2026-MAR-09 Units conversion: 1 au= 149597870.700 km, c= 299792.458 km/s, 1 day= 86400.0 s Table cut-offs 1: Elevation (-90.0deg=NO ),Airmass (>38.000=NO), Daylight (NO ) Table cut-offs 2: Solar elongation ( 0.0,180.0=NO ),Local Hour Angle( 0.0=NO ) Table cut-offs 3: RA/DEC angular rate ( 0.0=NO ) ******************************************************************************* Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.): EPOCH= 2457856.5 ! 2017-Apr-13.00 (TDB) Residual RMS= .1514 EC= .1354428631790678 QR= 2.527888467382581 TP= 2457129.4685003939 OM= 150.2750236911914 W= 227.3612622931746 IN= 3.098574197998143 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-3.198228540743174E+00 Y= 5.444066039441158E-01 Z= 2.979295093331773E-01 VX=-2.332260322758251E-03 VY=-8.121403709973612E-03 VZ=-3.009699354931045E-03 Asteroid physical parameters (km, seconds, rotational period in hours): GM= 1.601 RAD= 111. ROTPER= 4.196 H= 6.2 G= .200 B-V= .729 ALBEDO= .1203 STYP= X ******************************************************************************* Date__(UT)__HR:MN:SC.fff delta deldot S-O-T /r *********************************************************************** $$SOE 2024-Jul-29 00:00:00.000 1.72393306598811 -5.7412385 170.2950 /L 2024-Jul-29 05:36:00.000 1.72316656881675 -5.6343227 170.5619 /L 2024-Jul-29 11:12:00.000 1.72241449122649 -5.5272369 170.8287 /L 2024-Jul-29 16:48:00.000 1.72167685585490 -5.4199852 171.0956 /L 2024-Jul-29 22:24:00.000 1.72095368478586 -5.3125717 171.3624 /L 2024-Jul-30 04:00:00.000 1.72024499953187 -5.2050008 171.6291 /L 2024-Jul-30 09:36:00.000 1.71955082101735 -5.0972769 171.8957 /L 2024-Jul-30 15:12:00.000 1.71887116956300 -4.9894044 172.1621 /L 2024-Jul-30 20:48:00.000 1.71820606487113 -4.8813881 172.4284 /L 2024-Jul-31 02:24:00.000 1.71755552601201 -4.7732327 172.6945 /L 2024-Jul-31 08:00:00.000 1.71691957141122 -4.6649431 172.9604 /L 2024-Jul-31 13:36:00.000 1.71629821883797 -4.5565240 173.2259 /L 2024-Jul-31 19:12:00.000 1.71569148539436 -4.4479806 173.4912 /L 2024-Aug-01 00:48:00.000 1.71509938750560 -4.3393178 173.7560 /L 2024-Aug-01 06:24:00.000 1.71452194091125 -4.2305408 174.0204 /L 2024-Aug-01 12:00:00.000 1.71395916065727 -4.1216548 174.2842 /L 2024-Aug-01 17:36:00.000 1.71341106108911 -4.0126650 174.5474 /L 2024-Aug-01 23:12:00.000 1.71287765584569 -3.9035767 174.8098 /L 2024-Aug-02 04:48:00.000 1.71235895785426 -3.7943950 175.0714 /L 2024-Aug-02 10:24:00.000 1.71185497932618 -3.6851255 175.3318 /L 2024-Aug-02 16:00:00.000 1.71136573175362 -3.5757734 175.5910 /L 2024-Aug-02 21:36:00.000 1.71089122590707 -3.4663440 175.8486 /L 2024-Aug-03 03:12:00.000 1.71043147183372 -3.3568428 176.1044 /L 2024-Aug-03 08:48:00.000 1.70998647885669 -3.2472752 176.3579 /L 2024-Aug-03 14:24:00.000 1.70955625557500 -3.1376464 176.6085 /L 2024-Aug-03 20:00:00.000 1.70914080986439 -3.0279619 176.8557 /L 2024-Aug-04 01:36:00.000 1.70874014887874 -2.9182270 177.0984 /L 2024-Aug-04 07:12:00.000 1.70835427905230 -2.8084470 177.3355 /L 2024-Aug-04 12:48:00.000 1.70798320610248 -2.6986273 177.5653 /L 2024-Aug-04 18:24:00.000 1.70762693503332 -2.5887732 177.7854 /L 2024-Aug-05 00:00:00.000 1.70728547013936 -2.4788898 177.9926 /L 2024-Aug-05 05:36:00.000 1.70695881501019 -2.3689824 178.1826 /L 2024-Aug-05 11:12:00.000 1.70664697253527 -2.2590561 178.3494 /L 2024-Aug-05 16:48:00.000 1.70634994490926 -2.1491162 178.4851 /L 2024-Aug-05 22:24:00.000 1.70606773363758 -2.0391677 178.5810 /T 2024-Aug-06 04:00:00.000 1.70580033954230 -1.9292156 178.6285 /T 2024-Aug-06 09:36:00.000 1.70554776276822 -1.8192649 178.6226 /T 2024-Aug-06 15:12:00.000 1.70531000278914 -1.7093207 178.5640 /T 2024-Aug-06 20:48:00.000 1.70508705841421 -1.5993877 178.4586 /T 2024-Aug-07 02:24:00.000 1.70487892779435 -1.4894710 178.3153 /T 2024-Aug-07 08:00:00.000 1.70468560842871 -1.3795752 178.1427 /T 2024-Aug-07 13:36:00.000 1.70450709717109 -1.2697051 177.9482 /T 2024-Aug-07 19:12:00.000 1.70434339023632 -1.1598656 177.7375 /T 2024-Aug-08 00:48:00.000 1.70419448320649 -1.0500611 177.5147 /T 2024-Aug-08 06:24:00.000 1.70406037103718 -0.9402965 177.2827 /T 2024-Aug-08 12:00:00.000 1.70394104806341 -0.8305761 177.0438 /T 2024-Aug-08 17:36:00.000 1.70383650800555 -0.7209047 176.7995 /T 2024-Aug-08 23:12:00.000 1.70374674397499 -0.6112867 176.5509 /T 2024-Aug-09 04:48:00.000 1.70367174847968 -0.5017265 176.2988 /T 2024-Aug-09 10:24:00.000 1.70361151342948 -0.3922285 176.0441 /T 2024-Aug-09 16:00:00.000 1.70356603014133 -0.2827972 175.7871 /T 2024-Aug-09 21:36:00.000 1.70353528934431 -0.1734369 175.5283 /T 2024-Aug-10 03:12:00.000 1.70351928118448 -0.0641519 175.2679 /T 2024-Aug-10 08:48:00.000 1.70351799522973 0.0450535 175.0063 /T 2024-Aug-10 14:24:00.000 1.70353142047441 0.1541752 174.7435 /T 2024-Aug-10 20:00:00.000 1.70355954534400 0.2632088 174.4798 /T 2024-Aug-11 01:36:00.000 1.70360235769973 0.3721503 174.2154 /T 2024-Aug-11 07:12:00.000 1.70365984484324 0.4809954 173.9502 /T 2024-Aug-11 12:48:00.000 1.70373199352129 0.5897401 173.6845 /T 2024-Aug-11 18:24:00.000 1.70381878993071 0.6983803 173.4183 /T 2024-Aug-12 00:00:00.000 1.70392021972341 0.8069121 173.1516 /T $$EOE ******************************************************************************* Column meaning: TIME Times PRIOR to 1962 are UT1, a mean-solar time closely related to the prior but now-deprecated GMT. Times AFTER 1962 are in UTC, the current civil or "wall-clock" time-scale. UTC is kept within 0.9 seconds of UT1 using integer leap-seconds for 1972 and later years. Conversion from the internal Barycentric Dynamical Time (TDB) of solar system dynamics to the non-uniform civil UT time-scale requested for output has not been determined for UTC times after the next July or January 1st. Therefore, the last known leap-second is used as a constant over future intervals. Time tags refer to the UT time-scale conversion from TDB on Earth regardless of observer location within the solar system, although clock rates may differ due to the local gravity field and no analog to "UT" may be defined for that location. Any 'b' symbol in the 1st-column denotes a B.C. date. First-column blank (" ") denotes an A.D. date. CALENDAR SYSTEM Mixed calendar mode was active such that calendar dates after AD 1582-Oct-15 (if any) are in the modern Gregorian system. Dates prior to 1582-Oct-5 (if any) are in the Julian calendar system, which is automatically extended for dates prior to its adoption on 45-Jan-1 BC. The Julian calendar is useful for matching historical dates. The Gregorian calendar more accurately corresponds to the Earth's orbital motion and seasons. A "Gregorian-only" calendar mode is available if such physical events are the primary interest. NOTE: "n.a." in output means quantity "not available" at the print-time. 'delta deldot' = Apparent range ("delta", light-time aberrated) and range-rate ("delta-dot") of the target center relative to the observer. A positive "deldot" means the target center is moving away from the observer, negative indicates movement toward the observer. Units: AU and KM/S 'S-O-T /r' = Sun-Observer-Target apparent SOLAR ELONGATION ANGLE seen from the observers' location at print-time. The '/r' column provides a code indicating the targets' apparent position relative to the Sun in the observers' sky, as described below: Case A: For an observing location on the surface of a rotating body, that body rotational sense is considered: /T indicates target TRAILS Sun (evening sky: rises and sets AFTER Sun) /L indicates target LEADS Sun (morning sky: rises and sets BEFORE Sun) Case B: For an observing point that does not have a rotational model (such as a spacecraft), the "leading" and "trailing" condition is defined by the observers' heliocentric ORBITAL motion: * If continuing in the observers' current direction of heliocentric motion would encounter the targets' apparent longitude first, followed by the Sun's, the target LEADS the Sun as seen by the observer. * If the Sun's apparent longitude would be encountered first, followed by the targets', the target TRAILS the Sun. Two other codes can be output: /* indicates observer is Sun-centered (undefined) /? Target is aligned with Sun center (no lead or trail) The S-O-T solar elongation angle is numerically the minimum separation angle of the Sun and target in the sky in any direction. It does NOT indicate the amount of separation in the leading or trailing directions, which would be defined along the equator of a spherical coordinate system. Units: DEGREES Computations by ... Solar System Dynamics Group, Horizons On-Line Ephemeris System 4800 Oak Grove Drive, Jet Propulsion Laboratory Pasadena, CA 91109 USA General site: https://ssd.jpl.nasa.gov/ Mailing list: https://ssd.jpl.nasa.gov/email_list.html System news : https://ssd.jpl.nasa.gov/horizons/news.html User Guide : https://ssd.jpl.nasa.gov/horizons/manual.html Connect : browser https://ssd.jpl.nasa.gov/horizons/app.html#/x API https://ssd-api.jpl.nasa.gov/doc/horizons.html command-line telnet ssd.jpl.nasa.gov 6775 e-mail/batch https://ssd.jpl.nasa.gov/ftp/ssd/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF COMMAND = '16' QUANTITIES = '20,23' START_TIME = '2024-Jul-29' STEP_SIZE = '60' STOP_TIME = '2024-Aug-12'