Physics
Scientific paper
Dec 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977msngr..11....4h&link_type=abstract
The Messenger, vol. 11, p. 4-4
Physics
Scientific paper
A new catalogue, Perth70, containing one star per square degree has appeared: E. Hog and J. von der Heide, 1976, Abhandl. aus der Hamburger Sternwarte IX, and also available on magnetic tape from the Strasbourg Data Centre. The catalogue was observed about 1970 with a mean error 0".17 and contains approximate proper motions giving positional accuracy of ± 0".3 at the epoch 1980. The accuracy of the widely used SAO catalogue is about ± 1".
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