KPL/PCK

Asteroid Ceres SPICE PCK file, DAWN SPG 2016-01-07 Solution
===========================================================================


Pedigree and Intended Usage
--------------------------------------------------------

     This PCK file contains Ceres rotation values that were determined
     during the stereo photogrammetric analysis of Dawn images during
     the creation of the HAMO DTM (see [1]). Users of this DTM should
     also use this planetary constants kernel for SPICE based image
     processing.


Organization
--------------------------------------------------------

     The sections of this file are as follows.

     Introductory Information:

         --   Version description

         --   Disclaimer

         --   Sources

     Pck Data:

         --   Orientation constants for asteroid Ceres

         --   Radii for asteroid Ceres

         --   GM for asteroid Ceres


Version Description
--------------------------------------------------------


     Version 1.0 -- August 29, 2016  -- Steve Joy, IGPP/UCLA
                                        Boris Semenov, NAIF/JPL

        Initial version.


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 Description'' section
     if you modify the file.


Sources
--------------------------------------------------------

     The sources for the constants listed in this are:

        1) ``Dawn at Ceres - Shape Model and Rotational State'',
            Frank Preusker, et al., Lunar and Planet. Sci.
            Conf. abs. 1954, 2016.

        2) Official DAWN project PCK ``dawn_ceres_v05.tpc''


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.

     The Ceres rotation constants provided below are from [1].

     \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


Radii for asteroid Ceres
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     The Ceres radii values provided below are from [2]. They are
     included in this PCK for completeness.

     \begindata

        BODY2000001_RADII      = ( 482     482     446    )

     \begintext


GM for asteroid Ceres
--------------------------------------------------------

     The Ceres GM value provided below is from [2]. It is included in
     this PCK for completeness.

     \begindata

        BODY2000001_GM         = ( 62.6325 )

     \begintext


End of PCK file.