KPL/PCK

Asteroid Ceres P_constants (PcK) SPICE kernel file -- DLR170713 Solution
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Overview
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   This PCK provides Ceres rotation constants determined in 2017 by the
   DAWN FC team, DLR in the process of deriving their HAMO-based Ceres
   shape models.

 
Disclaimer
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   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 Description'' section if
   you modify the file.


Version Description
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   Version 1.0 -- March 29, 2018 -- Boris Semenov

      Updated comments. No changes to data. Original name of this
      PCK was dawn_ceres_dlr_170713.tpc.   

   Version 1.0 -- July 13, 2017 -- Boris Semenov


Contact Information
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   Thomas Roatsch, thomas.roatsch@dlr.de


References
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   Preusker,F.,Scholten,F.,Matz,K.-D.,Elgner,S.,Jaumann,R.,Roatsch,T.,
   Joy,S.P., Polanskey,C.A.,Raymond,C.A.,Russell,C.T., 2016. Dawn at
   Ceres - Shape model and rotational state, 47th Lunar and Planetary
   Science Conference (LPSC) - USRA-Houston, 2016 , Abstract 1954.
   http://www.hou.usra.edu/meetings/lpsc2016/pdf/1954.pdf


Orientation constants for asteroid Ceres
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   The inertial reference frame for Ceres 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 Ceres is 2000001. See the NAIF_IDs
   required reading for further information on NAIF integer codes.

   This PCK contains the following Ceres rotation constants provided
   by Thomas Roatsch, DLR via e-mail on July 13, 2017:

      We use these values for Ceres:

         body2000001_pole_ra    = ( 291.431     0.0         0.0 )
         body2000001_pole_dec   = (  66.761     0.0         0.0 )
         body2000001_pm         = ( 170.488   952.15323     0.0 )


   These rotation constants were used to produce and are consistent
   with the DSKs CERES_HAMO.shape.tar provided by Klaus-Dieter Matz, on
   June 16, 2017.


      \begindata
 
         BODY2000001_POLE_RA    = ( 291.431     0.0         0.0 )
         BODY2000001_POLE_DEC   = (  66.761     0.0         0.0 )
         BODY2000001_PM         = ( 170.488   952.15323     0.0 )

      \begintext

End of PCK file.