Compiled catalogue of positions and proper motions of 4272 stars north of delta = 80 deg

Details Compiled catalogue of positions and proper motions of 4272 stars north of delta = 80 deg Compiled catalogue of positions and proper motions of 4272 stars north of delta = 80 deg

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997kfnt...13a...7t&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, vol. 13, p. 7

Astronomy and Astrophysics

Astronomy

Stellar Motions, Astronomical Catalogs, Polar Caps, Root-Mean-Square Errors, Astronomical Photography, Error Analysis

Scientific paper

The main objective of the study was to compile a new catalogue of positions and proper motions of stars in the north polar cap and to study the systematic features of the source catalogues as well as the reference system in the polar region. To achieve the goal, thirteen source catalogues, both meridian and photographic, covering an epoch span about one and a half century, were collected. The compiled catalogue of positions and proper motions contains 4272 stars, north of delta = 80 in the FK5 system, J2000.0. The new catalogue was compiled using the method of infinitely overlapping circles. It represents the second use of this procedure to construct a star catalogue. External rms accuracy of positions for the epoch of 2000 is equal to 0.15 and 0.25 arcsec for the centennial proper motions, respectively. The internal rms errors of positions at the mean catalogue epoch, near 1940, are equal to 0.18 and 0.15 arcsec for right ascension and declination, respectively, while external rms position errors for that epoch are of the order of 0.05 arcsec. A comparison was made between the new catalogue and three modern catalogues, the FK5, PPM, and ACRS. The systematic differences between the new catalogue and PPM for the epoch of 2000 were found, especially in the case of errors depending on right ascension. The essential part of the systematic differences is considered as caused by some shortcomings of the PPM in the polar zone. For the mean epoch of the new catalogue positions, the systematic differences are smaller.

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