Astrometric positions of Pluto from 1973 to 1979

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Astrometry, Pluto (Planet), Position (Location), Astronomical Photography, Planet Ephemerides, Pluto, Astrometry, Position (Location), Analysis, Ephemeris, Data, Comparisons, Observations, Data Reduction, Equipment, Procedure, Computer Techniques

Scientific paper

Using 23 positions of Pluto acquired from 1973 to 1979, an analysis is presented of the (O-C)(alpha) and (O-C)(delta) differences obtained by a comparison with the ephemeris of Kaplan et al. (1972). (O-C) values are plotted along with those of Barbieri et al. (1975) and Jensen (1979). An increase in (O-C)(alpha) is recognizable in the 1979 observations; with regard to Jensen's values, a small systematic difference in 1977 and 1978 is apparent. In addition, the (O-C)(delta) are in good agreement with the results of Jensen, showing only a discrepancy with Barbieri's observations of 1973.

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