The first astrolabe catalogue at Valinhos

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Astrolabes, Astronomical Catalogs, Celestial Reference Systems, Error Analysis, Star Distribution

Scientific paper

Individual corrections to the ascensions and declinations of 199 stars of the FK4 and FK4 Supplement, derived from the Danjon astrolabe observations at Valinhos and covering the zone from +5 to -51 deg of declination, are presented. The chain method of differences was used to make the corrections. The observational station formulas used to obtain the catalogue are cited and discussed and the systematic errors for the zone of the catalogue are given. The results are compared with those of the General Catalogue of Astrolabes.

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