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Nature volume 104, page 420 (25 December 1919) | Download Citation

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Abstract

BARNARD'S PRteR-Moxiox STAR. —It was shown in Man. Not. for November, 1916, that this star was, observed by Lament at Munich in 1842, being Mun. (i) 15040. Further confirmation of this is given by K. Graff in Ast. Nach. (4989 and 5007). He has surveyed the region with the 6o-cm. refractor at Bergedorf, and gives visual magnitudes on the Harvard scale, and colour on the Osthoff scale, of twenty-eight stars in the region. The Barnard star is of mag. 9.37 and colour 3.4, being the reddest star in the field. There are nineteen individual measures of its magnitude, ranging from 9.22 to 9.60, but they are not grouped in a manner suggesting variability. The magnitude of the star Mun. (2) 6966, which Bauschinger observed in 1886 in an unsuccessful search for Mun. (i) 15040, is 10.79 and colour 2.0. Its proper motion is small, and it must have been extremely near the Barnard star in 1843. As there was some doubt whether the star B.D. +4° 3561 was the. Barnard star or Mun. (2) 6966, Prof. Kustner has re-examined the original zones at Bonn, with the following interesting result. Zone 462 was observed on 1854 May 30, the air being very clear. The following two stars were recorded in the region:—

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https://doi.org/10.1038/104420a0

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