The choice of a coordinate system for the processing of overlapping plates

Details The choice of a coordinate system for the processing of overlapping plates The choice of a coordinate system for the processing of overlapping plates

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987kfnt....3...25i&link_type=abstract

Kinematika i Fizika Nebesnykh Tel (ISSN 0233-7665), vol. 3, Sept.-Oct. 1987, p. 25-29. In Russian.

Astronomy and Astrophysics

Astronomy

Astronomical Coordinates, Astronomical Photography, Celestial Sphere, Data Processing, Photographic Plates, Reference Stars, Astrometry, Data Reduction, Mathematical Models, Polar Coordinates

Scientific paper

On the basis of a mathematical model, it is found that it is better to use the equal-interval azimuthal polar projection of the celestial sphere onto the auxiliary plane in the processing of a large number of overlapping plates. The coordinates of the stars on this plate are determined from the equatorial coordinates using the expressions: U = (pi/2-delta) sine alpha; V = -(pi/2-delta) cos alpha. These coordinates are related to the tangential polar coordinates U-prime, V-prime.

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