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The positions of Pluto obtained during the period May-June 1980 - Observations carried out at the European Southern Observatory (ESO), La Silla

1984; Institute of Physics; Volume: 89; Linguagem: Inglês

10.1086/113622

1538-3881

H. Debehogne, R. R. de Freitas Mourão, M. R. Nunes, O. C. Tavares,

Stellar, planetary, and galactic studies

Observations of Pluto were made in May and June 1980, using the European Southern Observatory (ESO) Astrograph (GPO = Grande Prisme Objectif, f= 4 m, d =40 cm) at La Silla. Measurement and reduction of the plate were performed at the Observatorio do Valongo with the Ascorecord measuring machine with a positional accuracy of 0.1 μ. The position of Pluto was determined relative to the position of five reference stars.