Astrometry with a scanning CCD

Details Astrometry with a scanning CCD Astrometry with a scanning CCD

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....91.1242g&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 91, May 1986, p. 1242, 1243.

Other

26

Asteroids, Astrometry, Astronomical Coordinates, Charge Coupled Devices, Comets, Coordinate Transformations, Focal Plane Devices, Position Errors, Scanning

Scientific paper

The authors use a scanning CCD for acquisition and astrometry of new and recovered comets, asteroids, and other solar system objects. The Newtonian focus of a 91 cm telescope has been modified from f/5 to f/3.85 with a relay lens to give a plate scale of 1.73 arcsec per pixel, a scale chosen for efficient coverage of sky. A typical scan will cover 30 minutes of time in right ascension by 0.156 deg in declination and is stored as a digital array of 14848x320 CCD pixel signals. Several potential reference (SAO) stars are observed in one such scan. The reduction from pixel coordinates to apparent topocentric equatorial coordinates of date involves only three free parameters.

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