******************************************************************************* JPL/HORIZONS Machholz (C/2004 Q2) 2024-May-11 18:33:37 Rec #:90003261 (+COV) Soln.date: 2021-Apr-15_23:30:43 # obs: 3612 (2004-2006) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2453459.5 ! 2005-Mar-30.0000000 (TDB) RMSW= n.a. EC= .9995013165564024 QR= 1.205041519739395 TP= 2453395.4111679844 OM= 93.62289508735844 W= 19.50470293910827 IN= 38.58894877332359 A= 2416.445813893445 MA= .0005317663345688642ADIST= 4831.68658626715 PER= 118788.33464761 N= 8.297E-6 ANGMOM= .026701969 DAN= 1.24063 DDN= 41.64621 L= 109.0984814 B= 12.0200065 MOID= .24926101 TP= 2005-Jan-24.9111679844 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 11.2 M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 1.224170923233E-8 A2= -1.087129116058E-9 A3= -2.285695523024E-9 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#102, data arc: 2004-08-27 to 2006-09-09 2: k1=4.5; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sat May 11 18:33:37 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: Machholz (C/2004 Q2) {source: JPL#102} 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 : 2.9630927493968080E-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= 2453459.5 ! 2005-Mar-30.0000000 (TDB) RMSW= n.a. EC= .9995013165564024 QR= 1.205041519739395 TP= 2453395.4111679844 OM= 93.62289508735844 W= 19.50470293910827 IN= 38.58894877332359 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-1.199352895351119E+00 Y=-9.869111497706307E-02 Z= 9.817701728985664E-01 VX=-9.319754233623176E-03 VY=-1.708211775846218E-02 VZ= 1.511876596047386E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 11.2 M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 1.224170923233E-8 A2= -1.087129116058E-9 A3= -2.285695523024E-9 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 ******************************************************************************* $$SOE 2433282.500000000 = A.D. 1950-Jan-01 00:00:00.0000 TDB EC= 9.995222445001243E-01 QR= 1.208115957432256E+00 IN= 3.856677398526021E+01 OM= 9.356467985923814E+01 W = 1.947669281648406E+01 Tp= 2453395.450940720271 N = 7.756054768468959E-06 MA= 3.598440028509482E+02 TA= 1.940111025812909E+02 A = 2.528732704795084E+03 AD= 5.056257293632736E+03 PR= 4.641535042577630E+07 2469807.500000000 = A.D. 2050-Jan-01 00:00:00.0000 TDB EC= 9.977694950362849E-01 QR= 1.198961725491258E+00 IN= 3.881564698638368E+01 OM= 9.341578308592996E+01 W = 1.944014588888531E+01 Tp= 2453395.657661799807 N = 7.913927500858950E-05 MA= 1.298821304200428E+00 TA= 1.653349366117917E+02 A = 5.375292792418654E+02 AD= 1.073859596758240E+03 PR= 4.548942354613773E+06 $$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 = '2004 Q2' TABLE_TYPE = 'ELEMENTS' START_TIME = '1950-01-01' STOP_TIME = '2050-01-01' STEP_SIZE = '100 years' CENTER = '@0' OUT_UNITS = 'AU-D'