Contents.
      planet: 9 - Pluto
  satellites: P1-Charon : 899
total number: 899
        type: relative
       dates: 1992-2010
 observatory: 250 - Hubble Space Telescope

Reference.
   Buie M., Tholen D., Grundy W. (2012)
   The Orbit of Charon is circular.
   Astronomical Journal. V. 144. P.15 (19pp)
   2012AJ____144___15B

Informations.
         relative to: planet
     reference frame: astrometric
     centre of frame: topocentre
    epoch of equinox: J2000
          time scale: UTC
           reduction: see reference
         coordinates: X,Y 
    diff. refraction: no information
            receptor: CCD
           telescope: HST
           observers: Buie M. W., Tholen D. J., Grundy W.
 data included in standard data file: no

Comments.
These observations include reprocessed observations of Charon 
which were earlier published in pm0001 and pm0004.
     
Format.
  1. Exposure midtime (JD, UTC)
  2. X, arcsec
  3. sigma X, uncertainty in X, arcsec
  4. Y, arcsec
  5. sigma Y, uncertainty in y, arcsec

----------------------------------------------------------
 Exposure            X        sigma X       Y     sigma Y
 midtime (JD, UTC) arcsec     arcsec     arcsec    arcsec  
----------------------------------------------------------