******************************************************************************* JPL/HORIZONS Great March comet (C/1843 D1) 2024-May-05 01:08:19 Rec #:90001641 Soln.date: - # obs: 200 (45 days) IAU76/J2000 helio. eclip. TWO-BODY elements (au, days, deg., period=Julian yrs) EPOCH= 2394259.411 ! 1843-Feb-27.9110000 (TDB) RMSW= n.a. EC= .999914 QR= .005527 TP= 2394259.4109999998 OM= 3.5272 W= 82.639 IN= 144.3548 A= 64.26744186044232 MA= 0. ADIST= 128.5293567208846 PER= 515.22238334572 N= .001913011 ANGMOM= .001808555 DAN= .0098 DDN= .01268 L= 282.5599014 B= 35.3072887 TP= 1843-Feb-27.9109999999 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: 1843-03-05 to 1843-04-19 2: ; TWO_BODY;time units are UT, but set to ET; n_obs is approximate; original epoc ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sun May 5 01:08:19 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: Great March comet (C/1843 D1) {source: DASTCOM} Center body name: Solar System Barycenter (0) {source: DE441} Center-site name: BODY CENTER ******************************************************************************* Start time : A.D. 1900-Jan-01 00:00:00.0000 TDB Stop time : A.D. 2000-Jan-01 00:00:00.0000 TDB Step-size : 400 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 TWO-BODY elements (au, days, deg.): EPOCH= 2394259.411 ! 1843-Feb-27.9110000 (TDB) RMSW= n.a. EC= .999914 QR= .005527 TP= 2394259.4109999998 OM= 3.5272 W= 82.639 IN= 144.3548 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 9.808294744457927E-04 Y=-5.309824444084246E-03 Z= 1.179604558766959E-03 VX=-3.218143834029238E-01 VY=-5.923495762139568E-02 VZ= 9.476043770445358E-04 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 ******************************************************************************* $$SOE 2415020.500000000 = A.D. 1900-Jan-01 00:00:00.0000 TDB EC= 9.999281532795136E-01 QR= 5.602662120493083E-03 IN= 1.441368268890694E+02 OM= 1.550178053971513E+00 W = 8.099075532696313E+01 Tp= 2394259.001062879805 N = 1.432234169139597E-03 MA= 2.973532818029870E+01 TA= 1.792755539884701E+02 A = 7.798076352743983E+01 AD= 1.559559243927592E+02 PR= 2.513555448940777E+05 $$EOE ******************************************************************************* ** WARNING ** The initial state available for this object was a Keplerian two-body orbital element set, not osculating elements. This means the orbit is probably very poorly determined. Predictions for times many months or years from the epoch may not be suitable for high-accuracy applications or expectations. Since the epoch is inside or within ~30 days of the relatively short data arc, the elements (such as they are) were numerically propagated with perturbations, just as if they were osculating elements. 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 = '1843 D1' TABLE_TYPE = 'ELEMENTS' START_TIME = '1900-01-01' STOP_TIME = '2000-01-01' STEP_SIZE = '400 years' CENTER = '@0' OUT_UNITS = 'AU-D'