Contents.
      planet: 9 - Pluto
  satellites: 1 - P1 Charon : 17
total number: 17
        type: relative
       dates: 1980-1984
 observatory: 493 - Calar Alto
              568 - Mauna Kea
              696 - Whipple Observatory, Mt. Hopkins
              W74 - Danish Telescope, La Silla

References.
  1. Hege, E. K.; Hubbard, E. N.; Drummond, J. D.; Strittmatter, P. A.; Worden, S. P.; Lauer, T. (1982).
     Speckle interferometric observations of Pluto and Charon.
     Icarus, Volume 50, Issue 1, p. 72-81.
     1982Icar___50___72H

  2. Bonneau, D.; Foy, R. (1980).
     Speckle interferometry with the 3.60 m CFH telescope. I - Resolution of the Pluto-Charon system.
     Astronomy and Astrophysics, vol. 92, no. 1-2, Dec. 1980, p. L1-L4. In French.
     1980A&A____92L___1B

  3. Baier, G.; Hetterich, N.; Weigelt, G. (1982).
     Digital speckle interferometry of Juno, Amphitrite and Pluto's moon Charon.
     The Messenger, No.30, P. 23.
     1982Msngr__30___23B

  4. Hetterich, N.; Weigelt, G. (1983).
     Speckle interferometry observations of Pluto's moon Charon.
     Astronomy and Astrophysics, vol. 125, no. 2, Sept. 1983, p. 246-248.
     1983A&A___125__246H
 
  5. Marsden, B. G. (1984).
     Pluto.
     International Astronomical Union Circular. No. 3986.
     1984IAUC_3986____1H
 
  6. Baier, G.; Weigelt, G. (1987).
     Speckle interferometric observations of Pluto and its moon Charon on seven different nights.
     Astronomy and Astrophysics, vol. 174, no. 1-2, March 1987, p. 295-298.
     1987A&A___174__295B

Informations.
         relative to: planet
     reference frame: astrometric
     centre of frame: topocentre
    epoch of equinox: 1950.0
          time scale: UT
           reduction: no information
         coordinates: apparent distance, position angle
    diff. refraction: no information
            receptor: CCD
           telescope: 493 - 2.2-m telescope
                      568 - Canada-France-Hawaii Telescope (3.6 m)
                      696 - Multiple Mirror Telescope (single 1.8-m mirror)
                      W74 - the Danish 1.54-m telescope
           observers: 493 - Baier, G.; Weigelt, G.
                      568 - Bonneau, D.; Foy, R.
                      696 - Hege, E. K.; Drummond, J. D.
                      W74 - Baier, G.; Hetterich, N.; Weigelt, G.

 data included in standard data file: no

Comments.

Format.
  1. Year of the date of observation
  2. Month of the date of observation
  3. Day of the date of observation
  4. Hour of the date of observation
  5. Minutes of the date of observation with decimals
  6. S (separation) in arcsecs
  7. Error for separation (sigmaS), arcsecs (-99.99 if not given)
  8. P (position angle) in degrees
  9. Error for position angle (sigmaP), degrees (-99.99 if not given)
 10. Observatory (Obs: 1 - Whipple, 2 - Mauna Kea, 3 - W74, 4 - Calar Alto)
 11. Reference to the publication (see References above)

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Year    Day    Min     S    sigmaS     P     sigmP   Ref
  Month     Hour     arcsec arcsec    deg     deg Obs
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