******************************************************************************* JPL/HORIZONS PANSTARRS (C/2017 T2) 2024-Apr-27 11:46:27 Rec #:90004427 (+COV) Soln.date: 2024-Jan-04_23:42:39 # obs: 6920 (2017-2021) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2458830.5 ! 2019-Dec-13.0000000 (TDB) RMSW= n.a. EC= .9996775076706628 QR= 1.615095477367039 TP= 2458974.4499490838 OM= 64.37877985821834 W= 92.99331624666259 IN= 57.2314400932906 A= 5008.167111094684 MA= 359.9995996891404 ADIST= 10014.719126712 PER= 354426.6909673 N= 2.781E-6 ANGMOM= .030914379 DAN= 3.40755 DDN= 3.06944 L= 159.8970986 B= 57.1101931 MOID= 1.20234001 TP= 2020-May-04.9499490838 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 10.2 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= -46.73576 A1= 3.594984292984E-8 A2= -7.57684186101E-10 A3= -3.192109614611E-10 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#59, data arc: 2017-09-15 to 2021-08-19 2: k1=4.5; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sat Apr 27 11:46:27 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: PANSTARRS (C/2017 T2) {source: JPL#59} 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= 2458830.5 ! 2019-Dec-13.0000000 (TDB) RMSW= n.a. EC= .9996775076706628 QR= 1.615095477367039 TP= 2458974.4499490838 OM= 64.37877985821834 W= 92.99331624666259 IN= 57.2314400932906 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 5.625476157187694E-01 Y= 1.797242713132280E+00 Z= 1.591100349581627E+00 VX=-9.734975188829244E-03 VY=-1.176041587656781E-02 VZ= 2.630014629968151E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 10.2 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= -46.73576 A1= 3.594984292984E-8 A2= -7.57684186101E-10 A3= -3.192109614611E-10 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 ******************************************************************************* $$SOE 2433282.500000000 = A.D. 1950-Jan-01 00:00:00.0000 TDB EC= 9.999562233251483E-01 QR= 1.619361955921628E+00 IN= 5.714104338922382E+01 OM= 6.447194534516812E+01 W = 9.290318461968334E+01 Tp= 2458974.565525249578 N = 1.386256237620066E-07 MA= 3.599964384213908E+02 TA= 1.950569802815259E+02 A = 3.699143348346662E+04 AD= 7.398124760497731E+04 PR= 2.596922489727082E+09 2469807.500000000 = A.D. 2050-Jan-01 00:00:00.0000 TDB EC= 9.989006211829848E-01 QR= 1.611117081424043E+00 IN= 5.717892330153275E+01 OM= 6.424641202731220E+01 W = 9.294230641712910E+01 Tp= 2458975.435024813749 N = 1.758027438455151E-05 MA= 1.904306744150524E-01 TA= 1.599254264692500E+02 A = 1.465479465756910E+03 AD= 2.929347814432396E+03 PR= 2.047749609166205E+07 $$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 = '2017 T2' TABLE_TYPE = 'ELEMENTS' START_TIME = '1950-01-01' STOP_TIME = '2050-01-01' STEP_SIZE = '100 years' CENTER = '@0' OUT_UNITS = 'AU-D'