Abstract
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 Sfi 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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BACKHOUSE, T. The Magnitude of θ Eridani. Nature 97, 479 (1916). https://doi.org/10.1038/097479d0
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DOI: https://doi.org/10.1038/097479d0
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