Contents.
      planet: 9 - Pluto
  satellites: 1 - P1 Charon   : 759
  satellites: 2 - P2 Nix      : 868
  satellites: 3 - P3 Hydra    : 860
  satellites: 4 - P4 Kerberos : 218
  satellites: 5 - P5 Styx     :  68
total number: 2773
        type: relative
       dates: 2006-1012
 observatory: 250 - HST

Reference.
   Brozovic M., Showalter M. R.. Jacobson R. A., Buie M, W. (2015)
   The orbits and masses of satellites of Pluto.
   Icarus. 2015. V. 246. P. 317-329. 
   Supplement Material.
   2015Icar__246__317B

Informations.
         relative to: absolute
     reference frame: astrometric
     centre of frame: topocentre
    epoch of equinox: ICRF
          time scale: UTC
           reduction: no information
         coordinates: X, Y relative to the given Pluto’s reference position 
    diff. refraction: no information
            receptor: HTS camera
           telescope: HST
           observers: HST Team

 data included in standard data file: no

Comments.
    The data of observation are given as X, Y cordinates relative to 
    the Pluto's absolute reference position given by Right ascension (RA) 
    and delination DEC. Thus the satellite coordinetes are given 
    for absolute position of sateliite. The Pluto's reference position  
    is explaned in the relevant paper (see Reference).
    Here X=Delta(alpha}*cos(delta), X=Delta(delta} whre
    Delta(alpha} is difference in Right ascension between satelite 
    and Pluto's reference position, and Delta(delta} is
    difference in Declination (delta is declination of the
.   Pluto's reference position).

Format.
  1. Year of the date of observation
  2. Month of the date of observation
  3. Day of the date of observation 
  4. Hour (h) of the date of observation
  5. Minute (m( of the date of observation 
  6. Seconds (s) of the date of observation with decimals (UTC)
  7. Number of the satellite (N sat)
  8. X, arcsec
  9. error of X, arcsec
 10. Y, arcsec
 11. error of Y, arcsec
 12. Right ascension (RA) of the Pluto's absolute reference position, deg,
 11. Declination (DEC) of the Pluto's absolute reference position, deg,

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Year   Day     m        N       X        sigma X      Y        sigma Y    RA            DEC  
  Month     h     s    sat    arcsec     arcsec     arcsec     arcsec     deg           deg
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