******************************************************************************* JPL/HORIZONS (2018 VG18) 2024-May-05 02:45:37 Rec #:50487718 (+COV) Soln.date: 2022-Mar-09_02:29:54 # obs: 34 (2003-2020) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457518.5 ! 2016-May-10.00 (TDB) Residual RMS= .30102 EC= .5309101028239022 QR= 38.23329642427787 TP= 2340362.5948755629 OM= 245.3511273265536 W= 16.50651088952509 IN= 24.36521745483206 A= 81.50526509831221 MA= 156.9241413882503 ADIST= 124.7772337723465 PER= 735.8456 N= .001339447 ANGMOM= .131606445 DAN= 38.78766 DDN= 119.21652 L= 260.457692 B= 6.7314518 MOID= 37.22499847 TP= 1695-Aug-05.0948755629 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 3.94 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ASTEROID comments: 1: soln ref.= JPL#8, OCC=6 2: source=ORB ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sun May 5 02:45:37 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: (2018 VG18) {source: JPL#8} Center body name: Solar System Barycenter (0) {source: DE441} Center-site name: BODY CENTER ******************************************************************************* Start time : A.D. 2023-Feb-25 00:00:00.0000 TDB Stop time : A.D. 2023-Sep-13 00:00:00.0000 TDB Step-size : 1 calendar years ******************************************************************************* Center geodetic : 0.0, 0.0, 0.0 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 0.0, 0.0, 0.0 {E-lon(deg),Dxy(km),Dz(km)} Center radii : (undefined) Keplerian GM : 2.9630927493968080E-04 au^3/d^2 Small perturbers: Yes {source: SB441-N16} Output units : AU-D, deg, Julian Day Number (Tp) Calendar mode : Mixed Julian/Gregorian Output type : GEOMETRIC osculating elements Output format : 10 Reference frame : Ecliptic of J2000.0 ******************************************************************************* Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.): EPOCH= 2457518.5 ! 2016-May-10.00 (TDB) Residual RMS= .30102 EC= .5309101028239022 QR= 38.23329642427787 TP= 2340362.5948755629 OM= 245.3511273265536 W= 16.50651088952509 IN= 24.36521745483206 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 3.652840495494810E+01 Y= 1.106732759403852E+02 Z= 4.017691139620635E+01 VX=-8.860239099775528E-04 VY= 5.732580964773865E-04 VZ=-2.377757922880476E-04 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 3.94 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ******************************************************************************* JDTDB EC QR IN OM W Tp N MA TA A AD PR ******************************************************************************* $$SOE 2460000.500000000 = A.D. 2023-Feb-25 00:00:00.0000 TDB EC= 5.300826094585788E-01 QR= 3.835829026979435E+01 IN= 2.429230670041430E+01 OM= 2.453245975229184E+02 W = 1.686516018458506E+01 Tp= 2340824.350250903051 N = 1.337330254215217E-03 MA= 1.593778706403507E+02 TA= 1.724826414506740E+02 A = 8.162773083498648E+01 AD= 1.248971714001786E+02 PR= 2.691930425302896E+05 $$EOE ******************************************************************************* TIME Barycentric Dynamical Time ("TDB" or T_eph) output was requested. This continuous coordinate time is equivalent to the relativistic proper time of a clock at rest in a reference frame co-moving with the solar system barycenter but outside the system's gravity well. It is the independent variable in the solar system relativistic equations of motion. TDB runs at a uniform rate of one SI second per second and is independent of irregularities in Earth's rotation. 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. REFERENCE FRAME AND COORDINATES Ecliptic at the standard reference epoch Reference epoch: J2000.0 X-Y plane: adopted Earth orbital plane at the reference epoch Note: IAU76 obliquity of 84381.448 arcseconds wrt ICRF X-Y plane X-axis : ICRF Z-axis : perpendicular to the X-Y plane in the directional (+ or -) sense of Earth's north pole at the reference epoch. Symbol meaning [1 au= 149597870.700 km, 1 day= 86400.0 s]: JDTDB Julian Day Number, Barycentric Dynamical Time EC Eccentricity, e QR Periapsis distance, q (au) IN Inclination w.r.t X-Y plane, i (degrees) OM Longitude of Ascending Node, OMEGA, (degrees) W Argument of Perifocus, w (degrees) Tp Time of periapsis (Julian Day Number) N Mean motion, n (degrees/day) MA Mean anomaly, M (degrees) TA True anomaly, nu (degrees) A Semi-major axis, a (au) AD Apoapsis distance (au) PR Sidereal orbit period (day) ABERRATIONS AND CORRECTIONS Geometric osculating elements have NO corrections or aberrations applied. 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 = '2018 VG18' TABLE_TYPE = 'ELEMENTS' START_TIME = 'JD2460000.5' STOP_TIME = 'JD2460200.5' STEP_SIZE = '1y' CENTER = '@0' OUT_UNITS = 'AU-D'