******************************************************************************* JPL/HORIZONS 4 Vesta (A807 FA) 2024-Apr-25 19:59:40 Rec #: 4 (+COV) Soln.date: 2021-Apr-13_11:15:57 # obs: 9451 (1950-2021) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2458849.5 ! 2020-Jan-01.00 (TDB) Residual RMS= .47385 EC= .08857261385730482 QR= 2.15270823108896 TP= 2458247.8038331456 OM= 103.8092892453337 W= 150.8357762126256 IN= 7.14181494423702 A= 2.361908654291772 MA= 163.3754032354997 ADIST= 2.571109077494583 PER= 3.62997 N= .271524753 ANGMOM= .026333145 DAN= 2.53982 DDN= 2.17514 L= 254.8345779 B= 3.4734318 MOID= 1.13987994 TP= 2018-May-09.3038331456 Asteroid physical parameters (km, seconds, rotational period in hours): GM= 17.28824 RAD= 262.7 ROTPER= 5.342128 H= 3.25 G= .320 B-V= .782 ALBEDO= .4228 STYP= V ASTEROID comments: 1: soln ref.= JPL#36, OCC=0 radar(2977 delay, 0 Dop 2: source=ORB ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Thu Apr 25 19:59:40 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 4 Vesta (A807 FA) {source: JPL#36} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2021-Dec-25 23:00:00.0000 UT Stop time : A.D. 2021-Dec-26 04:00:00.0000 UT Step-size : 15 minutes ******************************************************************************* Target pole/equ : IAU {East-longitude positive} Target radii : 289.0, 280.0, 229.0 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.240425.p240719 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-25. PREDICTS-> 2024-JUL-18 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= 2458849.5 ! 2020-Jan-01.00 (TDB) Residual RMS= .47385 EC= .08857261385730482 QR= 2.15270823108896 TP= 2458247.8038331456 OM= 103.8092892453337 W= 150.8357762126256 IN= 7.14181494423702 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.243605461680222E+00 Y= 2.133870405923554E+00 Z= 6.874866847781977E-01 VX=-8.779290950353064E-03 VY= 4.462599423343603E-03 VZ= 2.927653651039283E-03 Asteroid physical parameters (km, seconds, rotational period in hours): GM= 17.28824 RAD= 262.7 ROTPER= 5.342128 H= 3.25 G= .320 B-V= .782 ALBEDO= .4228 STYP= V ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2021-Dec-25 23:00 2.152921256259 -0.0015547 2021-Dec-25 23:15 2.152921247211 -0.0014532 2021-Dec-25 23:30 2.152921238773 -0.0013516 2021-Dec-25 23:45 2.152921230947 -0.0012501 2021-Dec-26 00:00 2.152921223732 -0.0011485 2021-Dec-26 00:15 2.152921217127 -0.0010470 2021-Dec-26 00:30 2.152921211134 -0.0009454 2021-Dec-26 00:45 2.152921205751 -0.0008439 2021-Dec-26 01:00 2.152921200980 -0.0007424 2021-Dec-26 01:15 2.152921196819 -0.0006408 2021-Dec-26 01:30 2.152921193269 -0.0005393 2021-Dec-26 01:45 2.152921190330 -0.0004377 2021-Dec-26 02:00 2.152921188003 -0.0003362 2021-Dec-26 02:15 2.152921186286 -0.0002346 2021-Dec-26 02:30 2.152921185180 -0.0001331 2021-Dec-26 02:45 2.152921184685 -0.0000315 2021-Dec-26 03:00 2.152921184801 0.0000700 2021-Dec-26 03:15 2.152921185527 0.0001716 2021-Dec-26 03:30 2.152921186865 0.0002731 2021-Dec-26 03:45 2.152921188814 0.0003747 2021-Dec-26 04:00 2.152921191374 0.0004762 $$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. 'r rdot' = The Sun's apparent range ("r", light-time aberrated) and range-rate ("rdot") relative to the target center, as seen by the observer. A positive "rdot" means the target center was moving away from the Sun, negative means moving toward the Sun. Units: AU and KM/S 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/hrzn_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF COMMAND = 'Vesta' START_TIME = '2021-Dec-25 23:00' STOP_TIME = '2021-Dec-26 04:00' STEP_SIZE = '15 minutes' QUANTITIES = '19'