******************************************************************************* JPL/HORIZONS 157P-B/Tritton 2024-May-02 05:36:58 Rec #:90001095 (+COV) Soln.date: 2022-Nov-15_15:16:10 # obs: 28 (38 days) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459834.5 ! 2022-Sep-12.0000000 (TDB) RMSW= n.a. EC= .5011093561620154 QR= 1.551987387462324 TP= 2459830.5656359619 OM= 287.1023341111452 W= 153.9770702895046 IN= 12.42744628542088 A= 3.110876915876446 MA= .7067313769717921 ADIST= 4.669766444290567 PER= 5.4869682182039 N= .179630398 ANGMOM= .02625619 DAN= 4.23818 DDN= 1.60635 L= 81.611062 B= 5.4177226 MOID= .57870001 TP= 2022-Sep-08.0656359619 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 15.7 M2= n.a. k1= 10. k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#4, data arc: 2022-08-21 to 2022-09-28 2: k1=10.; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Thu May 2 05:36:58 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 157P-B/Tritton {source: JPL#4} Center body name: Sun (10) {source: DE441} Center-site name: BODY CENTER ******************************************************************************* Start time : A.D. 2023-Feb-25 00:00:00.0000 TDB Stop time : A.D. 2023-May-25 00:00:00.0000 TDB Step-size : 4 calendar months ******************************************************************************* 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= 2459834.5 ! 2022-Sep-12.0000000 (TDB) RMSW= n.a. EC= .5011093561620154 QR= 1.551987387462324 TP= 2459830.5656359619 OM= 287.1023341111452 W= 153.9770702895046 IN= 12.42744628542088 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.608700632412810E-01 Y= 1.358246625567756E+00 Z= 7.344593836813175E-01 VX=-1.643283466801129E-02 VY= 3.383667274122241E-03 VZ=-2.146438762332166E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 15.7 M2= n.a. k1= 10. k2= n.a. PHCOF= n.a. ******************************************************************************* JDTDB EC QR IN OM W Tp N MA TA A AD PR ******************************************************************************* $$SOE 2460000.500000000 = A.D. 2023-Feb-25 00:00:00.0000 TDB EC= 5.011921956639667E-01 QR= 1.552035174576205E+00 IN= 1.242679382173713E+01 OM= 2.871002020173005E+02 W = 1.539890126098666E+02 Tp= 2459830.583853955381 N = 1.795773647511017E-01 MA= 3.051309373536753E+01 TA= 8.250371065014072E+01 A = 3.111489357393135E+00 AD= 4.670943540210065E+00 PR= 2.004706999119673E+03 $$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 ******************************************************************************* !$$SOF COMMAND = '157P-B' TABLE_TYPE = 'ELEMENTS' START_TIME = '2023-02-25' STOP_TIME = '2023-05-25' STEP_SIZE = '4 months' CENTER = '@Sun' OUT_UNITS = 'AU-D'