******************************************************************************* JPL/HORIZONS (2021 RR205) 2024-May-09 23:09:45 Rec #:50605135 (+COV) Soln.date: 2022-Oct-07_01:32:43 # obs: 17 (2017-2022) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2458903.5 ! 2020-Feb-24.00 (TDB) Residual RMS= .23138 EC= .9533511178119664 QR= 55.50752919510686 TP= 2448519.2214852772 OM= 108.2304128557437 W= 208.6275968371252 IN= 7.634966915489089 A= 1189.900520474757 MA= .2493528979506056 ADIST= 2324.293511754407 PER= 41046.31597 N= 2.4013E-5 ANGMOM= .17912143 DAN= 664.39814 DDN= 59.02947 L= 316.6439607 B= -3.6496761 MOID= 54.49399948 TP= 1991-Sep-19.7214852772 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 6.74 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ASTEROID comments: 1: soln ref.= JPL#2, OCC=3 2: source=ORB ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Thu May 9 23:09:45 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: (2021 RR205) {source: JPL#2} 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= 2458903.5 ! 2020-Feb-24.00 (TDB) Residual RMS= .23138 EC= .9533511178119664 QR= 55.50752919510686 TP= 2448519.2214852772 OM= 108.2304128557437 W= 208.6275968371252 IN= 7.634966915489089 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 5.874306631774694E+01 Y=-7.304104691407939E+00 Z=-1.081568521588754E+01 VX= 1.356728578682978E-03 VY= 2.654535230075016E-03 VZ= 8.360835569797688E-04 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 6.74 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 ******************************************************************************* $$SOE 2460000.500000000 = A.D. 2023-Feb-25 00:00:00.0000 TDB EC= 9.439508288407713E-01 QR= 5.554109774725348E+01 IN= 7.643562392059420E+00 OM= 1.083456838399950E+02 W = 2.085737182167088E+02 Tp= 2448513.874980287626 N = 3.161748772961028E-05 MA= 3.631782256153936E-01 TA= 3.575010772811029E+01 A = 9.909352198887655E+02 AD= 1.926329342030277E+03 PR= 1.138610388904664E+07 $$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 = '2021 RR205' TABLE_TYPE = 'ELEMENTS' START_TIME = 'JD2460000.5' STOP_TIME = 'JD2460200.5' STEP_SIZE = '1y' CENTER = '@0' OUT_UNITS = 'AU-D'