******************************************************************************* JPL/HORIZONS Ikeya-Seki (C/1965 S1-A) 2024-Apr-28 09:07:42 Rec #:90001987 Soln.date: - # obs: 119 (1965-1966) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2439040.5 ! 1965-Oct-07.0000000 (TDB) RMSW= n.a. EC= .999915 QR= .007786 TP= 2439054.6836999999 OM= 346.9947 W= 69.04859999999999 IN= 141.8642 A= 91.59999999999813 MA= 359.984054049915 ADIST= 183.1922139999963 PER= 876.7008200110899 N= .001124245 ANGMOM= .002146567 DAN= .01147 DDN= .02424 L= 282.9514555 B= 35.2187048 TP= 1965-Oct-21.1836999999 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= n.a. M2= n.a. k1= n.a. k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= SAO_2008, data arc: 1965-09-21 to 1966-01-14 2: 2008 SAO Comet Catalog ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sun Apr 28 09:07:42 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: Ikeya-Seki (C/1965 S1-A) {source: DASTCOM} Center body name: Solar System Barycenter (0) {source: DE441} Center-site name: BODY CENTER ******************************************************************************* Start time : A.D. 2200-Jan-01 00:00:00.0000 TDB Stop time : A.D. 2400-Jan-01 00:00:00.0000 TDB Step-size : 300 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= 2439040.5 ! 1965-Oct-07.0000000 (TDB) RMSW= n.a. EC= .999915 QR= .007786 TP= 2439054.6836999999 OM= 346.9947 W= 69.04859999999999 IN= 141.8642 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 2.225102471868105E-02 Y= 6.165157224460999E-01 Z=-1.566541036038425E-01 VX= 2.280084091472242E-03 VY=-2.953146004844016E-02 VZ= 7.019963588027261E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= n.a. M2= n.a. k1= n.a. k2= n.a. PHCOF= n.a. ******************************************************************************* JDTDB EC QR IN OM W Tp N MA TA A AD PR ******************************************************************************* $$SOE 2524593.500000000 = A.D. 2200-Jan-01 00:00:00.0000 TDB EC= 9.999082901971752E-01 QR= 7.874830143767534E-03 IN= 1.427157319105459E+02 OM= 3.502456510927539E+02 W = 7.164920718779648E+01 Tp= 2439055.001688753255 N = 1.239530171171707E-03 MA= 1.060275494535107E+02 TA= 1.797298297784007E+02 A = 8.586683103883780E+01 AD= 1.717257872475318E+02 PR= 2.904326238865957E+05 $$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 = '1965 S1-A' TABLE_TYPE = 'ELEMENTS' START_TIME = '2200-01-01' STOP_TIME = '2400-01-01' STEP_SIZE = '300 years' CENTER = '@0' OUT_UNITS = 'AU-D'