Harold Corwin

The object found by Bigourdan on 1 Jan 1892 is not the same object as the one he measured on 5 March 1899. The IC position is the estimated position from the earlier observation, and is for a double star. The later position, micrometrically measured, is for the brightest star in an asterism of six stars (three very faint) three arcminutes from the double star. Why did Bigourdan save the earlier less precise position? His observations offer no clues. Just the opposite, in fact: the nearby IC 2170 (which see), observed on the same nights, has as its IC position the later micrometric position!

― IC Notes by Harold Corwin

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