******************************************************************************* JPL/HORIZONS SWAN (C/2025 F2) 2025-Dec-12 18:01:56 Rec #:90004908 (+COV) Soln.date: 2025-Sep-30_14:13:43 # obs: 375 (2024-2025) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2460765.5 ! 2025-Mar-31.0000000 (TDB) RMSW= n.a. EC= 1.00013473623129 QR= .333495702386929 TP= 2460796.6607592436 OM= 329.8398736699384 W= 153.8356344251493 IN= 90.36480051861089 A= -2475.174637095944 MA= -.000249403954609987ADIST= 9.999999E99 PER= 9.999999E99 N= 8.004E-6 ANGMOM= .014049349 DAN= 6.51745 DDN= .35151 L= 150.0190943 B= 26.163795 MOID= .62823302 TP= 2025-May-01.1607592436 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 12.3 M2= n.a. k1= 13. k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#8, data arc: 2024-09-24 to 2025-04-27 2: k1=13.; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 18:01:56 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: SWAN (C/2025 F2) {source: JPL#8} Center body name: Solar System Barycenter (0) {source: DE441} Center-site name: BODY CENTER ******************************************************************************* Start time : A.D. 1800-Jan-01 00:00:00.0000 TDB Stop time : A.D. 2200-Jan-01 00:00:00.0000 TDB Step-size : 200 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= 2460765.5 ! 2025-Mar-31.0000000 (TDB) RMSW= n.a. EC= 1.00013473623129 QR= .333495702386929 TP= 2460796.6607592436 OM= 329.8398736699384 W= 153.8356344251493 IN= 90.36480051861089 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 4.847578599160515E-01 Y=-5.300880472163553E-01 Z= 5.020825118264972E-01 VX=-2.196785855088531E-02 VY= 1.388520826881115E-02 VZ= 1.640996508288292E-04 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 12.3 M2= n.a. k1= 13. k2= n.a. PHCOF= n.a. ******************************************************************************* JDTDB EC QR IN OM W Tp N MA TA A AD PR ******************************************************************************* $$SOE 2378496.500000000 = A.D. 1800-Jan-01 00:00:00.0000 TDB EC= 9.999642347833164E-01 QR= 3.260248648216167E-01 IN= 9.014693036347826E+01 OM= 3.298288794104088E+02 W = 1.540760320653738E+02 Tp= 2460794.922560887877 N = 1.133210163317925E-06 MA= 3.599067385911289E+02 TA= 1.845181105503732E+02 A = 9.115696619474646E+03 AD= 1.823106721408447E+04 PR= 3.176815842755561E+08 2451544.500000000 = A.D. 2000-Jan-01 00:00:00.0000 TDB EC= 9.999643088740026E-01 QR= 3.260845596918139E-01 IN= 9.015071238279963E+01 OM= 3.298277389969838E+02 W = 1.540752746489122E+02 Tp= 2460794.895963884890 N = 1.129380478775186E-06 MA= 3.599895527833775E+02 TA= 1.894282270396466E+02 A = 9.136292301736688E+03 AD= 1.827225851891369E+04 PR= 3.187588299652746E+08 2524593.500000000 = A.D. 2200-Jan-01 00:00:00.0000 TDB EC= 1.000121010388357E+00 QR= 3.344516575659452E-01 IN= 9.016398233700056E+01 OM= 3.300265442075888E+02 W = 1.538811915976626E+02 Tp= 2460796.960045195650 N = 6.787802670070543E-06 MA= 4.330383242464826E-01 TA= 1.749314308309394E+02 A =-2.763825999626143E+03 AD= 9.999999999999998E+99 PR= 9.999999999999998E+99 $$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 = '2025 F2' OUT_UNITS = 'AU-D' START_TIME = '1800-01-01' STEP_SIZE = '200 years' STOP_TIME = '2200-01-01' TABLE_TYPE = 'ELEMENTS'