The Magnitude of θ Eridani

Details The Magnitude of θ Eridani The Magnitude of θ Eridani

Aug 1916

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1916natur..97..479b&link_type=abstract

Nature, Volume 97, Issue 2441, pp. 479 (1916).

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Scientific paper

THE arguments of Mr. E. J. Webb (NATURE, vol. xcvii., p. 341) seem conclusive as to this star having been of the first magnitude at the epoch of Ptolemy's catalogue, but are perhaps less conclusive as to its magnitude at any other time, though the reviewer of Peters's and Knobel's work is surely wrong in assuming, that Al Sûfi would find any difficulty in judging between a first and a third magnitude star at an altitude of 10°. Have astronomers considered the possibility of θ Eridani having been practically a temporary star at Ptolemy's epoch? Do Peters and Knobel come to any conclusion as to the magnitude of this star?

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