Brightness variations at Potsdam Station

Details Brightness variations at Potsdam Station Brightness variations at Potsdam Station

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991an....312..405m&link_type=abstract

Astronomische Nachrichten (ISSN 0004-6337), vol. 312, no. 6, 1991, p. 405-411. In German.

Astronomy and Astrophysics

Astronomy

Astronomical Photography, Latitude Measurement, Long Term Effects, Photomultiplier Tubes, Stellar Motions, Astrometry, Geodetic Surveys, Polar Wandering (Geology)

Scientific paper

Latitude determinations with the photographic zenith tube PZT 2 of the geodetic-astronomical observatory Potsdam were analyzed for the period 1981-90 in order to investigate the long-term behavior. The original data were corrected for polar motion. The series of corrected latitude values show a significant linear trend seasonal variations with variable parameters. Investigations for the Czechoslovakian station Ondrejov lead to similar results. The cause of the obtained latitude variations could be systematic errors of the proper motions of the observed stars.

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