The astrometry programme at Mt. John Observatory

Details The astrometry programme at Mt. John Observatory The astrometry programme at Mt. John Observatory

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984coas.conf...66g&link_type=abstract

In JPL Cometary Astrometry p 66-70 (SEE N85-25015 14-89)

Physics

Optics

Astrography, Astrometry, Cameras, Cassegrain Optics, Reflecting Telescopes, Astronomical Catalogs, Ephemeris Time, Least Squares Method, Photographic Emulsions, Photographic Film

Scientific paper

The comet (and minor planet) astrometry program uses one of two 0.6 meter (24 in.) Cassegrain telescopes at Mt. John University Observatory. For astrometric photographs of comets and minor planets a simple guide probe camera is attached to the Cassegrain. Frequently the Cassegrain field does not include sufficient cataloged stars for a satisfactory reduction. In these cases the comet position is transferred to an astrograph plate. Ephemeris data are calculated to the tenth of a day nearest the meridian transit of the object or for dusk or dawn twilight for low objects. Star measurement and identification are checked by reducing positions of cataloged stars.

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