API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Ephemeris / API_USER Mon May 6 10:13:52 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: Neptune Barycenter (8) {source: DE441} Center body name: Solar System Barycenter (0) {source: DE441} Center-site name: BODY CENTER ******************************************************************************* Start time : A.D. 1881-Feb-02 00:00:00.0000 TDB Stop time : A.D. 1881-Feb-03 00:00:00.0000 TDB Step-size : 60 minutes ******************************************************************************* 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) Output units : KM-D Calendar mode : Mixed Julian/Gregorian Output type : GEOMETRIC cartesian states Output format : 6 (LT, range, and range-rate) Reference frame : Ecliptic of J2000.0 ******************************************************************************* JDTDB, Calendar Date (TDB), LT, RG, RR, ************************************************************************************************************************** $$SOE 2408113.500000000, A.D. 1881-Feb-02 00:00:00.0000, 1.721841396032804E-01, 4.459925356440414E+09, -1.775610666244478E-01, 2408113.541666667, A.D. 1881-Feb-02 01:00:00.0000, 1.721841396030089E-01, 4.459925356433380E+09, -1.600932159790273E-01, 2408113.583333333, A.D. 1881-Feb-02 02:00:00.0000, 1.721841396027653E-01, 4.459925356427073E+09, -1.426253883932667E-01, 2408113.625000000, A.D. 1881-Feb-02 03:00:00.0000, 1.721841396025500E-01, 4.459925356421494E+09, -1.251575835878349E-01, 2408113.666666667, A.D. 1881-Feb-02 04:00:00.0000, 1.721841396023627E-01, 4.459925356416644E+09, -1.076898016158184E-01, 2408113.708333333, A.D. 1881-Feb-02 05:00:00.0000, 1.721841396022035E-01, 4.459925356412521E+09, -9.022204256409987E-02, 2408113.750000000, A.D. 1881-Feb-02 06:00:00.0000, 1.721841396020724E-01, 4.459925356409125E+09, -7.275430640336375E-02, 2408113.791666667, A.D. 1881-Feb-02 07:00:00.0000, 1.721841396019694E-01, 4.459925356406457E+09, -5.528659310734295E-02, 2408113.833333333, A.D. 1881-Feb-02 08:00:00.0000, 1.721841396018945E-01, 4.459925356404518E+09, -3.781890258825515E-02, 2408113.875000000, A.D. 1881-Feb-02 09:00:00.0000, 1.721841396018478E-01, 4.459925356403306E+09, -2.035123490434648E-02, 2408113.916666667, A.D. 1881-Feb-02 10:00:00.0000, 1.721841396018291E-01, 4.459925356402822E+09, -2.883590222513597E-03, 2408113.958333333, A.D. 1881-Feb-02 11:00:00.0000, 1.721841396018385E-01, 4.459925356403066E+09, 1.458403165229071E-02, 2408114.000000000, A.D. 1881-Feb-02 12:00:00.0000, 1.721841396018760E-01, 4.459925356404037E+09, 3.205163069338877E-02, 2408114.041666667, A.D. 1881-Feb-02 13:00:00.0000, 1.721841396019416E-01, 4.459925356405737E+09, 4.951920692708190E-02, 2408114.083333333, A.D. 1881-Feb-02 14:00:00.0000, 1.721841396020353E-01, 4.459925356408164E+09, 6.698676024561424E-02, 2408114.125000000, A.D. 1881-Feb-02 15:00:00.0000, 1.721841396021571E-01, 4.459925356411319E+09, 8.445429075517470E-02, 2408114.166666667, A.D. 1881-Feb-02 16:00:00.0000, 1.721841396023070E-01, 4.459925356415202E+09, 1.019217984320074E-01, 2408114.208333333, A.D. 1881-Feb-02 17:00:00.0000, 1.721841396024850E-01, 4.459925356419812E+09, 1.193892832482304E-01, 2408114.250000000, A.D. 1881-Feb-02 18:00:00.0000, 1.721841396026911E-01, 4.459925356425151E+09, 1.368567452307574E-01, 2408114.291666667, A.D. 1881-Feb-02 19:00:00.0000, 1.721841396029253E-01, 4.459925356431218E+09, 1.543241844351693E-01, 2408114.333333333, A.D. 1881-Feb-02 20:00:00.0000, 1.721841396031876E-01, 4.459925356438011E+09, 1.717916007232026E-01, 2408114.375000000, A.D. 1881-Feb-02 21:00:00.0000, 1.721841396034780E-01, 4.459925356445534E+09, 1.892589943495820E-01, 2408114.416666667, A.D. 1881-Feb-02 22:00:00.0000, 1.721841396037965E-01, 4.459925356453783E+09, 2.067263649984577E-01, 2408114.458333333, A.D. 1881-Feb-02 23:00:00.0000, 1.721841396041431E-01, 4.459925356462761E+09, 2.241937128177309E-01, 2408114.500000000, A.D. 1881-Feb-03 00:00:00.0000, 1.721841396045178E-01, 4.459925356472466E+09, 2.416610378027369E-01, $$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 day=86400.0 s]: JDTDB Julian Day Number, Barycentric Dynamical Time LT One-way down-leg Newtonian light-time (day) RG Range; distance from coordinate center (km) RR Range-rate; radial velocity wrt coord. center (km/day) ABERRATIONS AND CORRECTIONS Geometric state vectors 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 *******************************************************************************