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A comparison of some astrometric catalogues with the use of stars with large proper motions

Yatsenko, A. I.; Ivanov, G. A.

Pairwise differences of positions and proper motions of stars from the catalogues HIPPARCOS, CMC11, FONAC, NPM1, and PPM were used to determine their random and systematic errors. A significant relationship between differences of coordinates and proper motions of stars and their B-V colour indices was found for some pairs of the catalogues.

Compiled catalogue of MK spectral classifications, including astrometric and photometric data

Rybka, S. P.

The catalogue constructed as a tool for stellar kinematic analysis is described. It contains up-to-date information on spectral classifications in the MK system, positions and proper motions in the ICRS system, as well as BV magnitudes for 71334 single stars. Astrometry and photometry were mainly selected from the Tycho-2. MK spectral types and lu…

A comparative estimation of the accuracy of modern astrometric catalogues

Nefedjev, Yu. A.; Rizvanov, N. G.; Shaimukhametov, R. R.

A method for a comparative estimation of the accuracy of astrometric catalogues in the random meaning is offered. The estimation is done by comparison of star coordinates in the catalogues under study with star coordinates in the HIPPARCOS catalogues for various epochs. Variances of star positions and proper motions in the catalogues under investi…