Photographic positional observations of Pluto in 1991

Details Photographic positional observations of Pluto in 1991 Photographic positional observations of Pluto in 1991

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993kfnt....9...22r&link_type=abstract

Kinematika i Fizika Nebesnykh Tel (ISSN 0233-7665), vol. 9, no. 4, p. 22-29.

Astronomy and Astrophysics

Astronomy

2

Photographic Measurement, Photographic Plates, Planet Ephemerides, Pluto (Planet), Position (Location), Schmidt Telescopes, Astronomical Catalogs, Astronomical Photography, Error Analysis, Reference Systems

Scientific paper

A normal astrograph and the Schmidt telescope were used to obtain 23 photographic positions of Pluto. Two reference catalogs (PPM and FOCAT) are employed for plate reduction. The reduction errors do not exceed 0.29 arcsec in both coordinates. The positions are compared with the DE200/LE200 ephemeris. The mean value of (O-C)alpha does not depend on the reference catalog and the telescope used. An increase of (O-C)sub alpha is confirmed: in 1991 they were +1.92 to +2.16 arcsec for plates of the normal astrograph and +2.19 arcsec for the Schmidt telescope.

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