******************************************************************************* JPL/HORIZONS Gleason (C/2003 A2) 2025-Dec-12 18:05:37 Rec #:90003006 (+COV) Soln.date: 2025-Jul-31_12:12:22 # obs: 165 (2002-2009) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2452859.5 ! 2003-Aug-08.0000000 (TDB) RMSW= n.a. EC= 1.00694108277569 QR= 11.42700644608068 TP= 2452948.5163940517 OM= 154.5446693076579 W= 346.6380100286772 IN= 8.061536049448632 A= -1646.28586279103 MA= -.001313458024904744ADIST= 9.999999E99 PER= 9.999999E99 N= 1.4755E-5 ANGMOM= .08237870999999999 DAN= 11.58435 DDN= 1128.75253 L= 141.3100534 B= -1.8572256 MOID= 10.44169998 TP= 2003-Nov-05.0163940517 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 6.5 M2= 9.1 k1= 7.5 k2= 5. PHCOF= .030 COMET comments 1: soln ref.= JPL#22, data arc: 2002-01-08 to 2009-03-08 2: k1=7.5, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 18:05:37 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: Gleason (C/2003 A2) {source: JPL#22} Center body name: Solar System Barycenter (0) {source: DE441} Center-site name: BODY CENTER ******************************************************************************* Start time : A.D. 1600-Jan-01 00:00:00.0000 TDB Stop time : A.D. 2500-Jan-01 00:00:00.0000 TDB Step-size : 900 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= 2452859.5 ! 2003-Aug-08.0000000 (TDB) RMSW= n.a. EC= 1.00694108277569 QR= 11.42700644608068 TP= 2452948.5163940517 OM= 154.5446693076579 W= 346.6380100286772 IN= 8.061536049448632 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-8.508045294424585E+00 Y= 7.180597202028673E+00 Z= 2.614432896123983E+00 VX=-4.642858843657346E-03 VY=-5.364900123398769E-03 VZ=-1.261847574201822E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 6.5 M2= 9.1 k1= 7.5 k2= 5. PHCOF= .030 ******************************************************************************* JDTDB EC QR IN OM W Tp N MA TA A AD PR ******************************************************************************* $$SOE 2305447.500000000 = A.D. 1600-Jan-01 00:00:00.0000 TDB EC= 9.994676533851914E-01 QR= 1.142259619060582E+01 IN= 8.065814485232785E+00 OM= 1.545672988153609E+02 W = 3.465980023993247E+02 Tp= 2452948.222867581528 N = 3.137904806715575E-07 MA= 3.599537156772719E+02 TA= 2.025881441381827E+02 A = 2.145706551494739E+04 AD= 4.290270843370417E+04 PR= 1.147262336414882E+09 2634166.500000000 = A.D. 2500-Jan-01 00:00:00.0000 TDB EC= 9.984078928326485E-01 QR= 1.142166126234511E+01 IN= 8.068640354381335E+00 OM= 1.545262537299711E+02 W = 3.466644776126878E+02 Tp= 2452947.782470988575 N = 1.623154228872352E-06 MA= 2.941459277080167E-01 TA= 1.591140863521613E+02 A = 7.173927419312109E+03 AD= 1.433643317736187E+04 PR= 2.217903841769253E+08 $$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/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF CENTER = '@0' COMMAND = '2003 A2' OUT_UNITS = 'AU-D' START_TIME = '1600-01-01' STEP_SIZE = '900 years' STOP_TIME = '2500-01-01' TABLE_TYPE = 'ELEMENTS'