KPL/PCK

Asteroid Patroclus P_constants (PcK) SPICE kernel file
===========================================================================
 
   This text PCK contains rotational and ellipsoidal shape constants
   for asteroid Patroclus. 
 
Version and Date
--------------------------------------------------------
 
   Version 1.0 -- April 20, 2021 -- Matt Barnes, NAIF/JPL
 
      This is the first Patroclus PCK released for official use by the 
      Lucy project. It contains values for the pole direction, 
      rotation period and shape from [1].
     
 
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 ``Version and Date`` if you modify
   the file.
 
 
Sources
--------------------------------------------------------
 
   The sources for the constants listed in this version of this file
   are:
 
     1) Lucy_Trojan_Target_PCK_Updates_19Apr2021.txt
        Provided by David Kaufmann, SWRI, 2021 April 20


Orientation constants for asteroid Patroclus
--------------------------------------------------------
 
   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 Patroclus is 920000617. See the 
   NAIF_IDs required reading for further information on NAIF integer 
   codes.
 
   The pole direction, prime meridian location, and rotation period
   in this version are set to the following values from [1]:

       "
          PATROCLUS                   920000617
            BODY920000617_POLE_RA   = (    0.0     0.0     0.0  )
            BODY920000617_POLE_DEC  = (  +90.0     0.0     0.0  )
            BODY920000617_PM        = (    0.0    84.0     0.0  )
       "

   The LONG_AXIS keyword providing the offset between the longest axis
   of the triaxial ellipsoid used to model Patroclus and the 
   Patroclus meridian is not used by SPICE geometry software. 
   It is considered deprecated and provided solely for backwards 
   compatibility.

   Pole RA and DEC are given in degrees, rate W1 in degrees/day.

      \begindata
 
         BODY920000617_POLE_RA   = (    0.0     0.0     0.0  )
         BODY920000617_POLE_DEC  = (  +90.0     0.0     0.0  )
         BODY920000617_PM        = (    0.0    84.0     0.0  )
         BODY920000617_LONG_AXIS = (    0.0                  )
 
      \begintext


Radii for asteroid Patroclus
--------------------------------------------------------

   The radii in this version are set based on following values from [1]:

       "
           BODY920000617_RADII     = (   63.5    58.5    49.0  )
       "

   Values are given in km.

      \begindata

         BODY920000617_RADII     = (   63.5    58.5    49.0  )
 
      \begintext

End of PCK file.