******************************************************************************* JPL/HORIZONS PANSTARRS (C/2017 K2) 2025-Dec-12 17:52:41 Rec #:90004437 (+COV) Soln.date: 2025-Dec-12_11:12:30 # obs: 3219 (2013-2025) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459453.5 ! 2021-Aug-27.0000000 (TDB) RMSW= n.a. EC= 1.000616610296381 QR= 1.797358586358627 TP= 2459933.2330854931 OM= 88.24135080911886 W= 236.1908235130619 IN= 87.55453569028981 A= -2914.902000352314 MA= -.003004469556315987ADIST= 9.999999E99 PER= 9.999999E99 N= 6.263E-6 ANGMOM= .032619759 DAN= 8.11281 DDN= 2.3098 L= 271.8870398 B= -56.1129839 MOID= 1.09150004 TP= 2022-Dec-19.7330854931 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 8.5 M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 1.857391476631E-8 A2= -1.439783871174E-9 A3= -1.118039727211E-8 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#178, data arc: 2013-05-12 to 2025-12-10 2: k1=4.5; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 17:52:42 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: PANSTARRS (C/2017 K2) {source: JPL#178} 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= 2459453.5 ! 2021-Aug-27.0000000 (TDB) RMSW= n.a. EC= 1.000616610296381 QR= 1.797358586358627 TP= 2459933.2330854931 OM= 88.24135080911886 W= 236.1908235130619 IN= 87.55453569028981 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-2.891491056185286E-01 Y=-4.726697720947358E+00 Z= 2.803497554442568E+00 VX= 4.484239356255326E-04 VY= 4.289917137380199E-03 VZ=-9.436074662441197E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 8.5 M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 1.857391476631E-8 A2= -1.439783871174E-9 A3= -1.118039727211E-8 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* JDTDB EC QR IN OM W Tp N MA TA A AD PR ******************************************************************************* $$SOE 2305447.500000000 = A.D. 1600-Jan-01 00:00:00.0000 TDB EC= 9.999344922947887E-01 QR= 1.795653396508289E+00 IN= 8.757331184201352E+01 OM= 8.808628725713689E+01 W = 2.362109941509821E+02 Tp= 2459932.308831025381 N = 2.173201856206253E-07 MA= 3.599664273326693E+02 TA= 1.886388705114554E+02 A = 2.741133109027440E+04 AD= 5.482086652715228E+04 PR= 1.656541931307062E+09 2634166.500000000 = A.D. 2500-Jan-01 00:00:00.0000 TDB EC= 9.979676836125307E-01 QR= 1.793490268513767E+00 IN= 8.778971747311357E+01 OM= 8.825554612682691E+01 W = 2.360457357036659E+02 Tp= 2459933.348759822082 N = 3.762129122038406E-05 MA= 6.554876123051939E+00 TA= 1.723452225727964E+02 A = 8.824857584045565E+02 AD= 1.763178026540599E+03 PR= 9.569049554709166E+06 $$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 = '2017 K2' OUT_UNITS = 'AU-D' START_TIME = '1600-01-01' STEP_SIZE = '900 years' STOP_TIME = '2500-01-01' TABLE_TYPE = 'ELEMENTS'