Automatic identification of star configurations on photographs

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Photography, Image Analysis, Pattern Recognition, Star Distribution, Astronomical Catalogs, Orbit Calculation, Stellar Motions

Scientific paper

A method for the identificaion of star configurations from sky photographs using two criteria is described. The method is based on the use of full systems of invariants with respect to the plane motion groups and similitude. Recursion formulas for calculating the invariants are presented. The method is particularly efficient in the case of approximate proportionality between the visible star magnitudes in the catalog and their optical densities or diameters on the photograph. The method, however, does not require that the majority of the stars on the photograph be listed in the catalog.

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