API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 96P/Machholz 1 2025-Dec-12 18:07:51 Rec #:90000922 Soln.date: - # obs: 133 (1986-2002) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2446560.5 ! 1986-May-10.0000000 (TDB) RMSW= n.a. EC= .958012 QR= .126774 TP= 2446544.0164999999 OM= 94.50060000000001 W= 14.5337 IN= 59.9884 A= 3.019291226064588 MA= 3.096677644683576 ADIST= 5.911808452129176 PER= 5.2464520709509 N= .187865298 ANGMOM= .008570461999999999 DAN= .12879 DDN= 3.417 L= 101.888808 B= 12.5506832 TP= 1986-Apr-23.5164999999 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 3.2 M1= 13.7 M2= 16.9 k1= 8.75 k2= 5. PHCOF= .030 COMET comments 1: soln ref.= SAO/1986 2: k1=8.75, k2=5., phase coef.=0.03;non-gravs. considered; 2008 SAO Comet Catalog ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Fri Dec 12 18:07:51 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: 96P/Machholz 1 {source: DASTCOM} Center body name: Sun (10) {source: DE441} Center-site name: BODY CENTER ******************************************************************************* Start time : A.D. 1600-Jan-01 00:00:00.0000 TDB Stop time : A.D. 2400-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 : 695700.0, 695700.0, 695700.0 km {Equator_a, b, pole_c} Keplerian GM : 2.9591220828411951E-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= 2446560.5 ! 1986-May-10.0000000 (TDB) RMSW= n.a. EC= .958012 QR= .126774 TP= 2446544.0164999999 OM= 94.50060000000001 W= 14.5337 IN= 59.9884 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-1.458363646853406E-01 Y=-5.652537807390683E-01 Z= 1.001599761735924E-01 VX=-1.001890139664258E-04 VY=-2.894531363199380E-02 VZ=-7.959830169740056E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 3.2 M1= 13.7 M2= 16.9 k1= 8.75 k2= 5. PHCOF= .030 ******************************************************************************* JDTDB EC QR IN OM W Tp N MA TA A AD PR ******************************************************************************* $$SOE 2305447.500000000 = A.D. 1600-Jan-01 00:00:00.0000 TDB EC= 8.884586345401111E-01 QR= 3.381837241673273E-01 IN= 7.087358021196424E+01 OM= 9.792497618622845E+01 W = 1.348704596788764E+01 Tp= 2306065.423004826065 N = 1.866933958566900E-01 MA= 2.446378558510320E+02 TA= 1.888315102001776E+02 A = 3.031913073441262E+00 AD= 5.725642422715196E+00 PR= 1.928295311936712E+03 2341972.500000000 = A.D. 1700-Jan-01 00:00:00.0000 TDB EC= 9.100488227004571E-01 QR= 2.715459124284045E-01 IN= 6.964523893679582E+01 OM= 9.743118461442958E+01 W = 1.356520125047120E+01 Tp= 2342512.219869778026 N = 1.879098072381519E-01 MA= 2.585813433074404E+02 TA= 1.897749315606481E+02 A = 3.018814434458594E+00 AD= 5.766082956488785E+00 PR= 1.915812725749570E+03 2378496.500000000 = A.D. 1800-Jan-01 00:00:00.0000 TDB EC= 9.258702664669846E-01 QR= 2.253621409186099E-01 IN= 6.634464246088615E+01 OM= 9.659752669642957E+01 W = 1.417774965576356E+01 Tp= 2379182.236943537835 N = 1.859393432971365E-01 MA= 2.324945230439713E+02 TA= 1.855540544045864E+02 A = 3.040104559639891E+00 AD= 5.854846978361172E+00 PR= 1.936115260043215E+03 2415020.500000000 = A.D. 1900-Jan-01 00:00:00.0000 TDB EC= 9.441458958474164E-01 QR= 1.689134848911771E-01 IN= 6.362129674726417E+01 OM= 9.567119209294404E+01 W = 1.412812695917669E+01 Tp= 2415867.186706984416 N = 1.874089064964919E-01 MA= 2.013233700989205E+02 TA= 1.818701822335061E+02 A = 3.024191103839649E+00 AD= 5.879468722788121E+00 PR= 1.920933250879081E+03 2451544.500000000 = A.D. 2000-Jan-01 00:00:00.0000 TDB EC= 9.586738169902014E-01 QR= 1.245819153928023E-01 IN= 6.010906563363051E+01 OM= 9.457336894443443E+01 W = 1.457541050550087E+01 Tp= 2452283.139959060121 N = 1.883039847285667E-01 MA= 2.209111524292561E+02 TA= 1.831021965099726E+02 A = 3.014600099004141E+00 AD= 5.904618282615480E+00 PR= 1.911802347246803E+03 2488069.500000000 = A.D. 2100-Jan-01 00:00:00.0000 TDB EC= 9.692214718264839E-01 QR= 9.326067402449531E-02 IN= 5.320909251346044E+01 OM= 9.248545447164081E+01 W = 1.575422144999347E+01 Tp= 2488882.902504171710 N = 1.868650240608205E-01 MA= 2.080035214867955E+02 TA= 1.817961207031153E+02 A = 3.030056326889058E+00 AD= 5.966851979753621E+00 PR= 1.926524248233997E+03 2524593.500000000 = A.D. 2200-Jan-01 00:00:00.0000 TDB EC= 9.778233655927508E-01 QR= 6.740507686047205E-02 IN= 4.402484584940822E+01 OM= 8.886191932125516E+01 W = 1.805897563454021E+01 Tp= 2523723.557443371508 N = 1.859981467401769E-01 MA= 1.618077033033151E+02 TA= 1.790218449795839E+02 A = 3.039463771763223E+00 AD= 6.011522466665975E+00 PR= 1.935503155861485E+03 2561117.500000000 = A.D. 2300-Jan-01 00:00:00.0000 TDB EC= 9.851893929838280E-01 QR= 4.485775963584879E-02 IN= 3.235079423732311E+01 OM= 8.176530623613205E+01 W = 2.337206079488812E+01 Tp= 2560375.018010348082 N = 1.869850963497596E-01 MA= 1.388330663730192E+02 TA= 1.781685915124962E+02 A = 3.028759022966986E+00 AD= 6.012660286298122E+00 PR= 1.925287132652606E+03 2597641.500000000 = A.D. 2400-Jan-01 00:00:00.0000 TDB EC= 9.894472308982766E-01 QR= 3.186816203345415E-02 IN= 1.505047353570590E+01 OM= 4.979778412652681E+01 W = 5.266321383998901E+01 Tp= 2596860.040173493791 N = 1.878097793662117E-01 MA= 1.467657975996936E+02 TA= 1.787657827741301E+02 A = 3.019886223820654E+00 AD= 6.007904285607853E+00 PR= 1.916833091518803E+03 $$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/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov *******************************************************************************