An analysis of coordinate transformation in Schmidt telescope photographic plates
Abstract
Concentric projection theory and an adjustment by means of third-degree polynomials are used to analyze the transformations relating celestial equatorial coordinates to rectangular coordinates, measured on a plate obtained by means of a Schmidt telescope lacking an objective prism. The results obtained show the presence of distortions probably due to photographic emulsion random defects. Systematic defects in the reference catalog, and/or anomalous atmospheric refraction and filter effects. It is found that the mean radiation detected in the actual position of any stellar image reaches a value of 0.64 arcsec within a circular plate zone of approximately one deg radius.
- Publication:
-
Revista Mexicana de Astronomia y Astrofisica, vol. 6
- Pub Date:
- December 1981
- Bibcode:
- 1981RMxAA...6..129P
- Keywords:
-
- Astrometry;
- Astronomical Coordinates;
- Astronomical Photography;
- Coordinate Transformations;
- Schmidt Telescopes;
- Star Distribution;
- Cartesian Coordinates;
- Error Analysis;
- Photographic Measurement;
- Polynomials;
- Position Errors;
- Projective Geometry;
- Reference Stars;
- Astronomy