******************************************************************************* JPL/HORIZONS Siding Spring (C/2007 Q3) 2024-Mar-28 05:14:21 Rec #:90003834 (+COV) Soln.date: 2023-Apr-24_19:06:39 # obs: 1333 (2007-2011) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2455063.5 ! 2009-Aug-20.0000000 (TDB) RMSW= n.a. EC= 1.000237622400141 QR= 2.251688537472099 TP= 2455111.7707217652 OM= 149.412683432869 W= 2.092857654701453 IN= 65.65049237334571 A= -9475.910251456788 MA= -5.1577045221729E-5 ADIST= 9.999999E99 PER= 9.999999E99 N= 1.068E-6 ANGMOM= .036507021 DAN= 2.25244 DDN= 10484.40168 L= 150.2758909 B= 1.9066203 MOID= 1.26176 TP= 2009-Oct-07.2707217652 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 8.6 M2= n.a. k1= 5.75 k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#120, data arc: 2007-08-25 to 2011-09-03 2: k1=5.75; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Thu Mar 28 05:14:21 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: Siding Spring (C/2007 Q3) {source: JPL#120} Center body name: Solar System Barycenter (0) {source: DE441} Center-site name: BODY CENTER ******************************************************************************* Start time : A.D. 1950-Jan-01 00:00:00.0000 TDB Stop time : A.D. 2050-Jan-01 00:00:00.0000 TDB Step-size : 100 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 : 2.9630927493983752E-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= 2455063.5 ! 2009-Aug-20.0000000 (TDB) RMSW= n.a. EC= 1.000237622400141 QR= 2.251688537472099 TP= 2455111.7707217652 OM= 149.412683432869 W= 2.092857654701453 IN= 65.65049237334571 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-1.758349433870592E+00 Y= 1.510584635494382E+00 Z=-3.487027145557414E-02 VX=-5.158139623795745E-03 VY=-9.899674290505641E-03 VZ= 1.143225797420789E-02 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 8.6 M2= n.a. k1= 5.75 k2= n.a. PHCOF= n.a. ******************************************************************************* JDTDB EC QR IN OM W Tp N MA TA A AD PR ******************************************************************************* $$SOE 2433282.500000000 = A.D. 1950-Jan-01 00:00:00.0000 TDB EC= 9.999342034921020E-01 QR= 2.255429621798414E+00 IN= 6.562032051946905E+01 OM= 1.494317515224477E+02 W = 2.067030970212885E+00 Tp= 2455111.515604014508 N = 1.554016414912907E-07 MA= 3.599966077351430E+02 TA= 1.988789272156905E+02 A = 3.427886515339788E+04 AD= 6.855547487717397E+04 PR= 2.316577846574264E+09 2469807.500000000 = A.D. 2050-Jan-01 00:00:00.0000 TDB EC= 9.997014123189288E-01 QR= 2.253702372101011E+00 IN= 6.564697553783135E+01 OM= 1.493702143892955E+02 W = 2.091806307417645E+00 Tp= 2455112.213220315985 N = 1.504036034678337E-06 MA= 2.210224085655121E-02 TA= 1.583788881321099E+02 A = 7.547874594202893E+03 AD= 1.509349548603369E+04 PR= 2.393559673435563E+08 $$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/hrzn_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF COMMAND = '2007 Q3' TABLE_TYPE = 'ELEMENTS' START_TIME = '1950-01-01' STOP_TIME = '2050-01-01' STEP_SIZE = '100 years' CENTER = '@0' OUT_UNITS = 'AU-D'