******************************************************************************* JPL/HORIZONS McNaught-Russell (C/1993 Y1) 2024-May-02 16:13:21 Rec #:90002195 (+COV) Soln.date: 2021-Apr-15_23:29:47 # obs: 377 (1993-1994) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2449470.5 ! 1994-Apr-28.0000000 (TDB) RMSW= n.a. EC= .9935569221319066 QR= .8676346411697747 TP= 2449442.59591129 OM= 166.3590730828903 W= 353.4675579575653 IN= 51.58646888894948 A= 134.6615172022624 MA= .0175997566506144 ADIST= 268.455399763355 PER= 1562.6922458086 N= .000630723 ANGMOM= .02262373 DAN= .8704499999999999 DDN= 134.1497 L= 162.2894314 B= -5.1141801 MOID= .121186 TP= 1994-Mar-31.0959112900 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 12.3 M2= 16.9 k1= 10. k2= 5. PHCOF= .030 Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 1.690531849861E-8 A2= 8.655670285225E-10 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#16, data arc: 1993-12-17 to 1994-09-08 2: k1=10., k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Thu May 2 16:13:21 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: McNaught-Russell (C/1993 Y1) {source: JPL#16} 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 : 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 osculating elements (au, days, deg.): EPOCH= 2449470.5 ! 1994-Apr-28.0000000 (TDB) RMSW= n.a. EC= .9935569221319066 QR= .8676346411697747 TP= 2449442.59591129 OM= 166.3590730828903 W= 353.4675579575653 IN= 51.58646888894948 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-8.691943273506326E-01 Y=-3.485414875743947E-01 Z= 3.642488077864042E-01 VX= 2.772474365108069E-03 VY=-2.160966589161594E-02 VZ= 1.058893559847198E-02 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 12.3 M2= 16.9 k1= 10. k2= 5. PHCOF= .030 Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 1.690531849861E-8 A2= 8.655670285225E-10 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* JDTDB EC QR IN OM W Tp N MA TA A AD PR ******************************************************************************* $$SOE 2378496.500000000 = A.D. 1800-Jan-01 00:00:00.0000 TDB EC= 9.935824110050453E-01 QR= 8.702649170354855E-01 IN= 5.148676612424747E+01 OM= 1.663060238474233E+02 W = 3.534509528552582E+02 Tp= 2449442.855061672162 N = 6.245624800577136E-04 MA= 3.156895685316271E+02 TA= 1.854207907775119E+02 A = 1.356062093910425E+02 AD= 2.703421538650495E+02 PR= 5.764035008422754E+05 2524593.500000000 = A.D. 2200-Jan-01 00:00:00.0000 TDB EC= 9.927013294682806E-01 QR= 8.641640108952947E-01 IN= 5.177176041438268E+01 OM= 1.662127064233469E+02 W = 3.533986072039990E+02 Tp= 2449443.215669159312 N = 7.655377851344152E-04 MA= 5.753038221885317E+01 TA= 1.752120332516124E+02 A = 1.184001945477234E+02 AD= 2.359362250845514E+02 PR= 4.702576502305372E+05 $$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 = '1993 Y1' TABLE_TYPE = 'ELEMENTS' START_TIME = '1800-01-01' STOP_TIME = '2200-01-01' STEP_SIZE = '400 years' CENTER = '@0' OUT_UNITS = 'AU-D'