Abstract
THE VARIABLE STAR χ CYGNI.—A maximum of this variable should now be close at hand. Prof. Winnecke assigns it to July 31, rather later than the average period of the last few years would give it. Its brightness at maximum has varied during the present century from 4m. to a very little above 7m. In vol. vi. of the Bonn Observations, Argelander has given nine observations of the position of this star, about which there has been so much and unnecessary confusion. Its place for 1880·0 is in right ascension 1911. 45m. 57·33s., declination 32° 36′ 42″·1. A comparison of Lalande's observation in 1793 with Argelander's shows that there is no appreciable proper motion. The variability of χ Cygni was discovered in 1686 by Kirch, whose first observed maximum is dated November 28, 1687.
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Our Astronomical Column . Nature 24, 277–278 (1881). https://doi.org/10.1038/024277b0
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DOI: https://doi.org/10.1038/024277b0