Objects In This Ephemeris
--------------------------------------------------------
 
        Name                  Id-code
        -------------         -------
        Prometheus............616
 
 
Approximate Time Coverage
 
        From: 1971 AUG 26 04:48:31 (TDB)
        To  : 2011 AUG 16 04:48:30 (TDB)
 
 
Status
--------------------------------------------------------
 
     This is the current best estimate for the position of Prometheus as of
     July 20, 1998. Currently, no formal updates to this ephemeris are
     planned. However, if you need a more recent ephemeris and have reason
     to believe that observations following the creation date of this
     ephemeris may significantly improve the positional knowledge for
     Prometheus, we recommend that you contact NAIF and to the extent that
     resources are available we will attempt to provide an update to this
     ephemeris.
 
 
Production/History of this Ephemeris
--------------------------------------------------------
 
     This ephemeris was produced by Bill Taber of the Navigation Ancillary
     Information Facility (NAIF) at the Jet Propulsion Laboratory on July
     20, 1998 for use by the general SPICE user community. It was
     transformed to SPK format using a custom program to package
     equinoctial elements provided by Bob Jacobson of the Solar Systems
     Dynamics group of the Astrodynamics and Navigation section (section
     312) of the Jet Propulsion Laboratory.
 
     The elements provided are shown below:
 
        Elements for Promet at Julian Date: 2444839.700352778
        Semi-major axis             139377.4260000000       km
        h = esin(omega+node)       -1.242198628344100E-03
        k = ecos(omega+node)       -1.923542406971122E-03
        mean longitude              188.5381493090702       deg
        p = tan(i/2)sin(node)         0.
        q = tan(i/2)cos(node)         0.
        apsidal rate                3.191385931437856E-05   deg/sec
        mean longitude rate         6.797328358741667E-03   deg/sec
        nodal rate                 -3.176541076443906E-05   deg/sec
        Reference plane pole RTA    40.58861887893110       deg
        Reference plane pole DEC    83.52533375484340       deg
 
 
Usage
--------------------------------------------------------
 
     To determine the state of Prometheus with respect to any object
     other than the Saturn , you need at a minimum a Saturn satellite
     ephemeris and a planetary ephemeris. The JPL planetary ephemeris
     DE-403 (or any later ephemeris) is recommended for this purpose.
 
     DE403 is available via anonymous ftp on NAIF's ftp server: naif-sun
     (ip address 128.149.126.11) in the directory
     pub/naif/generic_kernels/spk. Both binary and transfer format
     ephemerides are available. They are in the files.
 
        de403s.bsp ( binary format )
        de403s.xsp ( transfer format )
        de403s.cmt ( comments about de403s )
 
 
Special Attributes
 
     This ephemeris has been produced with custom corrections to longitude
     quantities (mean longitude, mean longitude rate) so as to match
     observations made with the Hubble Space Telescope.
 
 
Inquiries
 
     If you have any questions regarding this ephemeris contact
 
        Bill Taber
        btaber@spice.jpl.nasa.gov
        Phone (818) 354-4279
        FAX   (818) 393-6388
 
        JPL
        MS 301/125L
        4800 Oak Grove Drive
        Pasadena, CA 91109