IMPORTANT: This informal file release should not be used for "Category A" flight project purposes (involving the safety and success of spacecraft hardware and mission) without first contacting Donald.K.Yeomans@jpl.nasa.gov (Supervisor, Solar System Dynamics Group, 818-354-2127). That is, this particular object's orbit may be insufficiently well-determined, over the chosen time-span, to be suitable for some high-precision purposes. The "n-body" perturbed, numerically integrated SPK states were generated by: Horizons On-Line Ephemeris System Solar System Dynamics Group 4800 Oak Grove Drive, Jet Propulsion Laboratory Pasadena, CA 91109 USA information: http://ssd.jpl.nasa.gov/ connect : telnet ssd.jpl.nasa.gov 6775 inquiries : Jon.D.Giorgini@jpl.nasa.gov (program author; 818-393-3107) Copyright (2004), California Institute of Technology. US Government sponsorship acknowledged. SPK file contents: ******************************************************************************* JPL On-Line Ephemerides Horizons ******************************************************************************* Target body : 4 Vesta {source: Horizons-SPK:JPL#27} Target SPK ID : 2000004 Coord center : Sun ( 10) {source: SB405-CPV-2} GM of center : 2.9591220828559109E-04 AU^3/D^2 Small perturbers: Ceres, Pallas {source: SB405-CPV-2} Small body GMs : 6.32E+01, 1.43E+01 km^3/s^2 Requested by : Boris.Semenov@jpl.nasa.gov Execution date : Wed Oct 18 10:48:58 2006 (Pasadena time) Start time : 1900-Jan-01 00:00:00.0000 CT Stop time : 2100-Jan-01 00:00:00.0000 CT Step (days) : 0.5000 ******************************************************************************* Initial FK5/J2000.0 heliocentric ecliptic osculating elements (AU, DAYS, DEG): EPOCH= 2444686.5 ! 1981-Mar-23.00 (CT) Residual RMS= .4411 EC= .08972689062498941 QR= 2.149895937055027 TP= 2444990.438069798 OM= 104.124211017328 W= 150.2295814692592 IN= 7.140226359613001 Asteroid physical parameters (KM, SEC, rotational period in hours): GM= 17.8 RAD= 265. ROTPER= 5.342 H= 3.2 G= .320 B-V= .782 ALBEDO= .4228 STYP= V ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ A-posteriori SPK fidelity estimate (rel. to integrator): Max. error (3 std. dev) Time ------------------------ ------------------------ X: 0.6901359421144420D-03 m 1904-Aug-24 12:00:00.000 Y: 0.2768207594781947D-03 m 2022-May-25 12:00:00.000 Z: 0.8878217650526906D-04 m 1904-Aug-24 12:00:00.000 RSS: 0.7488655595908292D-03 m 2022-May-25 12:00:00.000 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ *******************************************************************************