planet: 6 - Saturn
  satellites: S9-Phoebe : 7 (1995-1995 : 6, 1997-1997 : 1 )
total number: 7
        type: absolute
       dates: 1995-1997
 observatory: 950 - La Palma

   Observations communicated to NSDC by :
      Derek Jones
      Institute of Astronomy Madingley Road,
      Cambridge CB3 0HA
      United Kingdom
        Work: +44 (0)1223 766661
        Fax:  +44 (0)1223 337523
        Home: +44 (0)1954 210314

         relative to: absolute
     reference frame: astrometric
     centre of frame: topocentre
    epoch of equinox: J2000
          time scale: UTC
           reduction: DSS-II, USNO ACT
         coordinates: absolute
    diff. refraction: no information
            receptor: CCD
           telescope: Jacobus Kapteyn Telescope, D = 1 m.
           observers: Harper D., Beurle K.
 data included in standard data file: no

 The pixels were 0.33 arcsec and the CCD chip size 330 arcsec on 
 the side.  A red (R) filter was used and the exposure was 64 sec.  
 It is straightforward to measure the position of Phoebe and about 
 ten reference stars on each exposure.  The positions of the 
 reference stars were measured on the Digital Sky Survey (DSS-II 
 with 1 arcsec pixels) together with about ten stars from the USNO 
 ACT catalogue, all within 0.7 degrees of the CCD fields.   The 
 goodness of fit was 0.12 arcsec, rms in one co-ordinate.
    The goodness of fit of the reference stars to the positions 
 measured on the CCD was smaller.  Phoebe was measured relative to 
 the same reference stars within each night but relative to a 
 different set of reference stars on different nights.   The 
 scatter of the residuals relative to the JPL Horizons ephemeris 
 within nights was much smaller than from night to night.   This 
 indicates that the accuracy is simply the accuracy of the star 
 positions, i.e. 0.12 arcsec.
    The observations have been combined into one normal place for 
 each of the seven nights with an rms scatter of 0.04 arcsec 
 within nights.

  1. Julian date in MJD (JD - 2400000.5) UTC  
  2. Hour   of right ascension (alpha, h)
  3. Minute of right ascension (alpha, m)
  4. Second of right ascension (alpha, s)
  5. Degree of declination (delta, deg)
  6. Minute of declination (delta, '  )
  7. Second of declination (delta, '' )
  8. The residuals in right ascension (arcsec) from the JPL Horizons 
  9. The residuals in declination (arcsec) from the JPL 
     Horizons ephemeris 
 10. The number of CCD exposures (n). 

 Date in MJD   alpha         delta       residuals(arcsec)
              h  m  s      deg  '  ''      alpha  delta     n