******************************************************************************* JPL/HORIZONS 4015 Wilson-Harrington (1979 VA) 2025-Dec-12 17:51:28 Rec #: 4015 (+COV) Soln.date: 2025-May-15_05:49:06 # obs: 1521 (1949-2025) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457631.5 ! 2016-Aug-31.00 (TDB) Residual RMS= .23529 EC= .6295882702110686 QR= .9758578349991582 TP= 2458261.8155836239 OM= 267.7732253702962 W= 94.19902903341993 IN= 2.775594424667958 A= 2.63452195629772 MA= 214.7188112058651 ADIST= 4.293186077596283 PER= 4.27623 N= .230489603 ANGMOM= .021692703 DAN= 1.6671 DDN= 1.52017 L= 1.9771686 B= 2.7681381 MOID= .0440591 TP= 2018-May-23.3155836239 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= 2. ROTPER= 3.5736 H= 16.19 G= .150 B-V= .666 ALBEDO= .050 STYP= CF ASTEROID comments: 1: soln ref.= JPL#333, PHA OCC=0 2: source=ORB ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 17:51:28 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: 4015 Wilson-Harrington (1979 VA) {source: JPL#333} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2026-Nov-25 00:00:00.0000 UT Stop time : A.D. 2026-Nov-26 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 2. km 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= 2457631.5 ! 2016-Aug-31.00 (TDB) Residual RMS= .23529 EC= .6295882702110686 QR= .9758578349991582 TP= 2458261.8155836239 OM= 267.7732253702962 W= 94.19902903341993 IN= 2.775594424667958 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-4.076898519792221E+00 Y=-7.398684996244342E-01 Z=-5.342092942421416E-01 VX= 2.610818459031239E-03 VY=-4.406263670186366E-03 VZ=-1.762753710704307E-03 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= 2. ROTPER= 3.5736 H= 16.19 G= .150 B-V= .666 ALBEDO= .050 STYP= CF ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2026-Nov-25 00:00 0.969878423982 -0.2193333 2026-Nov-25 03:00 0.969864139309 -0.1763882 2026-Nov-25 06:00 0.969852955172 -0.1334406 2026-Nov-25 09:00 0.969844871735 -0.0904910 2026-Nov-25 12:00 0.969839889115 -0.0475402 2026-Nov-25 15:00 0.969838007383 -0.0045886 2026-Nov-25 18:00 0.969839226567 0.0383631 2026-Nov-25 21:00 0.969843546647 0.0813141 2026-Nov-26 00:00 0.969850967559 0.1242640 $$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/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF COMMAND = '107P' QUANTITIES = '19' START_TIME = '2026-Nov-25' STEP_SIZE = '3 hours' STOP_TIME = '2026-Nov-26'