Contents.
      planet: 5 -Jupiter
  satellites: J1-Io       : 2,
              J2-Europe   : 1,
              J3-Ganymede : 3,
              J4-Callisto : 3
total number: 9
        type: absolute
       dates: 1987-1987
 observatory: 286 - Yunnan Observatory

Reference.
   Yan D., Qiao R. C., Dourneau G., Yu Y.,
   Zhang H. Y., Cheng X., Xi X. J. (2016)
   Digitization and reduction of old astronomical plates of natural satellites.
   Monthly Notices of the Royal Astronomical Society. 2016. V. 457. Issue 3. P. 2900-2907.      
   2016MNRAS_457_2900Y

Informations.
           relative to: absolute
       reference frame: astrometric
       center of frame: topocenter
      epoch of equinox: ICRF
            time scale: UTC
             reduction: UCAC4
           coordinates: absolute
      diff. refraction: no information
              receptor: photographic
             telescope: see in the paper
             observers: Yan D., Qiao R. C., Dourneau G., Yu Y., Zhang H. Y., Cheng X., Xi X. J. 
data included in standard data file: no

Comments.

Format.
  1. Number of satellite (N): 1 - J1, 2 - J2, 3 - J3, 4 - J4
  2. Year   of the moment of observation
  3. Month  of the moment of observation
  4. Day    of the moment of observation with decimals
  5. Right ascension (alpha), hours
  6. Declination (delta), degrees
  7. Observatory code

-------------------------------------------------
N  Year    Day       alpha         delta      Obs
      Month          hours       degrrees    code
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