Harold Corwin

IC 1016 = IC 4424 = NGC 5619B. Swift found IC 1016 on 28 April 1891, a peculiarly unfortunate night for him. Only two -- IC 872 and IC 1016 -- of the five nebulae that he found then are identifiable, and both of those were poorly measured by him (see IC 872 for more). IC 1016 is recoverable only because Swift's declination is fairly accurate, as is his description ("vF, vS, R; f of [NGC] 5619"); the RA is 1m 18s too large.

Bigourdan found and first measured the object the next year; he remeasured it seven years later. His micrometric observations put the faint galaxy within five arcsec of its true position. Thus, it ended up in IC2 with a pretty good position, compromised only by the imprecise position that Bigourdan adopted for his comparison star.

The NGC designation came along nearly four decades later when Holmberg included N5619 and two of its companions in his list of multiple galaxies. RNGC then immortalized it for us as "5619B".

― IC Notes by Harold Corwin

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