Second Greenwich Catalog of Stars for 1925.0 (London 1935)

Details Second Greenwich Catalog of Stars for 1925.0 (London 1935) Second Greenwich Catalog of Stars for 1925.0 (London 1935)

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ycat.1034....0r&link_type=abstract

VizieR On-line Data Catalog: I/34. Originally published in: London (1935)

Astronomy and Astrophysics

Astronomy

1

Positional Data, Proper Motions

Scientific paper

The observations for these two catalogs were made with the transit circle at the Royal Observatory in Greenwich, England, between the years 1922 and 1930 under the direction of Sir Frank Dyson, Astronomer Royal. Part I contains fundamental stars contained in the annual volumes of Greenwich Observations of the Sun, Moon and Planets. In addition, 232 stars observed at the prime vertical, South of +32dDec., have been observed. Part II contains all stars down to 7.9 mag in the A.G. scale between the limits of 32d and 64d Dec with the addition of 285 fainter stars in the sparse region of the sky from 12h to 16h RA. From internal information, the probable error of one observation of a star is found to be +/-0.35 arcsec in RA and +/-0.28 arcsec in DE. As the number of observations is generally 5, the pe of a position in the catalog, apart from systematic errors, should be +/-0.15 arcsec. In determining the proper motion of the fundamental stars, the positions of this catalogue were combined with the First Greenwich Catalog of Stars for 1925.0 (Observed 1915-1921), the two Pulkova Catalogues and the two Cape Catalogues preceding this catalogue. Note that the problable errors on the proper motions are not included in this electronic version. (2 data files).

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