API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 96P/Machholz 1 2024-May-13 04:07:32 Rec #:90000922 Soln.date: - # obs: 133 (1986-2002) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2448440.5 ! 1991-Jul-03.0000000 (TDB) RMSW= n.a. EC= .958369 QR= .125548 TP= 2448459.4824999999 OM= 94.5176 W= 14.5364 IN= 60.1462 A= 3.01573346784848 MA= 356.4275344550888 ADIST= 5.90591893569696 PER= 5.2371816295468 N= .188197842 ANGMOM= .008529696999999999 DAN= .12755 DDN= 3.40021 L= 101.8723503 B= 12.5732498 TP= 1991-Jul-21.9824999999 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 3.2 M1= 13.6 M2= 16.9 k1= 9. k2= 5. PHCOF= .030 COMET comments 1: soln ref.= SAO/1991 2: k1=9., k2=5., phase coef.=0.03;non-gravs. considered; 2008 SAO Comet Catalog ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Mon May 13 04:07:32 2024 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= 2448440.5 ! 1991-Jul-03.0000000 (TDB) RMSW= n.a. EC= .958369 QR= .125548 TP= 2448459.4824999999 OM= 94.5176 W= 14.5364 IN= 60.1462 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 3.154683648578464E-01 Y=-4.123971530873155E-02 Z=-5.752110724672997E-01 VX=-1.015188370103663E-02 VY= 1.441050042995409E-02 VZ= 2.216965494509629E-02 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 3.2 M1= 13.6 M2= 16.9 k1= 9. 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= 8.884792806912594E-01 QR= 3.381199881042566E-01 IN= 7.087316883190495E+01 OM= 9.792475109387321E+01 W = 1.348579743538515E+01 Tp= 2306065.258705010638 N = 1.866943389823021E-01 MA= 2.446679469174380E+02 TA= 1.888351810984055E+02 A = 3.031902862536113E+00 AD= 5.725685736967970E+00 PR= 1.928285570748488E+03 2341972.500000000 = A.D. 1700-Jan-01 00:00:00.0000 TDB EC= 9.100600909757771E-01 QR= 2.715134700531481E-01 IN= 6.964391482052309E+01 OM= 9.743098795439384E+01 W = 1.356462100970836E+01 Tp= 2342512.263259190135 N = 1.879081727586389E-01 MA= 2.585740722432922E+02 TA= 1.897731412573120E+02 A = 3.018831940112628E+00 AD= 5.766150410172107E+00 PR= 1.915829390041521E+03 2378496.500000000 = A.D. 1800-Jan-01 00:00:00.0000 TDB EC= 9.258803423661638E-01 QR= 2.253303544373886E-01 IN= 6.634484021321508E+01 OM= 9.659745325478062E+01 W = 1.417692130314689E+01 Tp= 2379182.257073570509 N = 1.859407725543306E-01 MA= 2.324897999556894E+02 TA= 1.855530931213507E+02 A = 3.040088980855244E+00 AD= 5.854847607273098E+00 PR= 1.936100377849138E+03 2415020.500000000 = A.D. 1900-Jan-01 00:00:00.0000 TDB EC= 9.441501597743719E-01 QR= 1.689003601408922E-01 IN= 6.362173691785498E+01 OM= 9.567121487213770E+01 W = 1.412780616300762E+01 Tp= 2415867.022265417501 N = 1.874092890035733E-01 MA= 2.013538641123756E+02 TA= 1.818728112950736E+02 A = 3.024186988871417E+00 AD= 5.879473617601941E+00 PR= 1.920929330205910E+03 2451544.500000000 = A.D. 2000-Jan-01 00:00:00.0000 TDB EC= 9.586738841940671E-01 QR= 1.245823775719303E-01 IN= 6.010900469055747E+01 OM= 9.457339911976925E+01 W = 1.457544018529752E+01 Tp= 2452283.163768722676 N = 1.883024775447114E-01 MA= 2.209077822770261E+02 TA= 1.831019266159349E+02 A = 3.014616185004345E+00 AD= 5.904649992436761E+00 PR= 1.911817649422695E+03 2488069.500000000 = A.D. 2100-Jan-01 00:00:00.0000 TDB EC= 9.692207133106834E-01 QR= 9.326317213177901E-02 IN= 5.321068303503039E+01 OM= 9.248576161087725E+01 W = 1.575412024422769E+01 Tp= 2488883.161723904777 N = 1.868644236879576E-01 MA= 2.079555708855928E+02 TA= 1.817930048588977E+02 A = 3.030062817022678E+00 AD= 5.966862461913577E+00 PR= 1.926530437924124E+03 2524593.500000000 = A.D. 2200-Jan-01 00:00:00.0000 TDB EC= 9.778236084529991E-01 QR= 6.740383342413914E-02 IN= 4.402964057549059E+01 OM= 8.886360798447855E+01 W = 1.805766237008233E+01 Tp= 2523723.603363126051 N = 1.860002381580501E-01 MA= 1.618009816314809E+02 TA= 1.790214860086448E+02 A = 3.039440987560245E+00 AD= 6.011478141696352E+00 PR= 1.935481392739384E+03 2561117.500000000 = A.D. 2300-Jan-01 00:00:00.0000 TDB EC= 9.851892833345757E-01 QR= 4.485835228975018E-02 IN= 3.235766279404042E+01 OM= 8.177034710060406E+01 W = 2.336783076566172E+01 Tp= 2560374.811734440271 N = 1.869834672414978E-01 MA= 1.388704269739175E+02 TA= 1.781703223600229E+02 A = 3.028776615143290E+00 AD= 6.012694877996831E+00 PR= 1.925303906869175E+03 2597641.500000000 = A.D. 2400-Jan-01 00:00:00.0000 TDB EC= 9.894488932808760E-01 QR= 3.186332627981818E-02 IN= 1.505635317683642E+01 OM= 4.982557316166108E+01 W = 5.263628090483483E+01 Tp= 2596860.285700106993 N = 1.878081485587936E-01 MA= 1.467184112905990E+02 TA= 1.787640705398334E+02 A = 3.019903705652569E+00 AD= 6.007944085025319E+00 PR= 1.916849736087470E+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/hrzn_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov *******************************************************************************