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Nature volume 14, pages 2930 | Download Citation



THE BINARY λ OPHIUCHI.—An examination of the recent measures of this star, shows that neither of the orbits computed some 25 or more years since by Mädler and Hind at all represents the later course of the companion, a circumstance mainly attributable, as it appears, to error in one, if not in both, of Sir W. Herschel's measures. Struve at first considered that the angle of 1783 required a correction of 180°, but at a later period he was inclined to apply a similar correction to the angle of 1802, and Dawes also believed it was the latter measure which required alteration, in order to render any orbit possible. It is upon this supposition that the orbits of Mädler and Hind have been calculated: the two sets of elements are subjoined:—

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