******************************************************************************* JPL/HORIZONS ATLAS (C/2019 E3) 2025-Dec-12 18:03:40 Rec #:90004526 (+COV) Soln.date: 2025-Nov-21_15:51:32 # obs: 957 (2012-2025) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459793.5 ! 2022-Aug-02.0000000 (TDB) RMSW= n.a. EC= 1.001049853459123 QR= 10.31340916097375 TP= 2460262.8540776651 OM= 347.2541025258748 W= 280.6642574539691 IN= 84.29757611277284 A= -9823.665456690534 MA= -.000475110165646462ADIST= 9.999999E99 PER= 9.999999E99 N= 1.012E-6 ANGMOM= .078146858 DAN= 17.41209 DDN= 25.32997 L= 319.4352052 B= -77.9224421 MOID= 10.06760025 TP= 2023-Nov-14.3540776651 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 6.1 M2= 7.8 k1= 6.5 k2= 5. PHCOF= .030 COMET comments 1: soln ref.= JPL#115, data arc: 2012-03-19 to 2025-11-19 2: k1=6.5, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 18:03:40 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: ATLAS (C/2019 E3) {source: JPL#115} 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= 2459793.5 ! 2022-Aug-02.0000000 (TDB) RMSW= n.a. EC= 1.001049853459123 QR= 10.31340916097375 TP= 2460262.8540776651 OM= 347.2541025258748 W= 280.6642574539691 IN= 84.29757611277284 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-1.798795642603685E+00 Y= 3.545406971739935E+00 Z=-9.841615219097037E+00 VX= 7.286784242496991E-03 VY=-1.550866393939134E-03 VZ=-5.339308144660708E-04 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 6.1 M2= 7.8 k1= 6.5 k2= 5. PHCOF= .030 ******************************************************************************* JDTDB EC QR IN OM W Tp N MA TA A AD PR ******************************************************************************* $$SOE 2305447.500000000 = A.D. 1600-Jan-01 00:00:00.0000 TDB EC= 9.997104588241565E-01 QR= 1.031306021962869E+01 IN= 8.428206415725957E+01 OM= 3.471825639677997E+02 W = 2.807091993047366E+02 Tp= 2460264.900643792003 N = 1.467166578707458E-07 MA= 3.599772857083973E+02 TA= 2.010744893302621E+02 A = 3.561863071663766E+04 AD= 7.122694837305570E+04 PR= 2.453709109957727E+09 2634166.500000000 = A.D. 2500-Jan-01 00:00:00.0000 TDB EC= 9.994195530998853E-01 QR= 1.030872328059949E+01 IN= 8.428477661625725E+01 OM= 3.471801517323818E+02 W = 2.806862716348203E+02 Tp= 2460265.227767922916 N = 4.167078450737398E-07 MA= 7.246602440739951E-02 TA= 1.598028706670785E+02 A = 1.775997645704805E+04 AD= 3.550964419081550E+04 PR= 8.639146208929546E+08 $$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 = '2019 E3' OUT_UNITS = 'AU-D' START_TIME = '1600-01-01' STEP_SIZE = '900 years' STOP_TIME = '2500-01-01' TABLE_TYPE = 'ELEMENTS'