KPL/PCK

P_constants (PcK) SPICE kernel file
===========================================================================
 
     By: Boris Semenov (NAIF)    13-AUG-2004
 
 
Organization
--------------------------------------------------------
 
     The sections of this file are as follows.
 
     Introductory Information:
 
         --   Version description
 
         --   Disclaimer
 
         --   Sources
 
     Pck Data:
 
         --   Orientation constants Asteroid 2867 Steins
 
         --   Radii for Asteroid 2867 Steins
 
 
Version description
--------------------------------------------------------
      
     This file was created on August 13, 2004. 
     
     This is a preliminary PCK containing draft values for the shape
     (obtained from [1]) and placeholder values for rotation period
     (set to 24 hours), pole direction (set to line up with the
     ecliptic north pole in J2000 coordinates) and prime meridian.

 
Disclaimer
--------------------------------------------------------
 
     This constants file may not contain the parameter values that you
     prefer. Note that this file may be readily modified by you or
     anyone else. NAIF suggests that you inspect this file visually
     before proceeding with any critical or extended data processing.
 
     NAIF requests that you update the `by line' and date if you modify
     the file.
 
 
Sources
--------------------------------------------------------
 
     The sources for the constants listed in this file are:
 
        1) ESA Science and Technology Server, Rosetta area,
           http://sci.esa.int/science-e/www/object/index.cfm?
           fobjectid=34849

 
Orientation constants for Asteroid 2867 Steins
-------------------------------------------------------- 
 
     The inertial reference frame for these constants is J2000; this is
     the default reference frame for PCK orientation data.
 
     The epoch of the constants is J2000; this is Julian ephemeris date
     (JED) 2451545.0.
 
     The NAIF integer code for 2867 Steins is 2002867. See the NAIF_IDs
     required reading for further information on NAIF integer codes.
 
     The pole has been arbitrarily chosen to point toward ecliptic
     north at the J2000 epoch. The RA and DEC below are those of the
     ecliptic north pole in J2000 coordinates.
 
     The prime meridian W0 term has been arbitrarily chosen to be zero
     at the J2000 epoch. The W1 term corresponds to an arbitrarily chosen 
     period of 24 hours.
 
     \begindata
 
        BODY2002867_POLE_RA    = ( 270.0        0.0   0.0 )
        BODY2002867_POLE_DEC   = (  66.560709   0.0   0.0 )
        BODY2002867_PM         = (   0.0      360.0   0.0 )
 
     \begintext
 
     
Radii for Asteroid 2867 Steins
--------------------------------------------------------
     
     The radii provided in the keyword below are 

          a/b/c = 5km/5km/5km

     corresponding to the 10 km diameter specified in [1].
 
     \begindata
 
        BODY2002867_RADII      = ( 5.0  5.0  5.0 )
 
     \begintext