Harold Corwin

IC 77 and IC 80 are two of Javelle's galaxies in the core of Abell 151. He found both on 31 August 1892, and measured both with respect to BD -16 189. His positions are very good since the BD position for the star is within 10 arcsec of the modern position.

MCG misidentified IC 80 as IC 77. This has caused some confusion in modern catalogues, though RC2 has the right IC number on the pair, calling the brighter of the two "IC 80A" (though the RC2 position is for the southern; my apologies!). That is MCG -03-04-008 which is actually northeast of MCG -03-04-009, the fainter galaxy, called "IC 80B" in RC2 (again my apologies for the wrong position in RC2).

These are the two objects in the cluster with redshifts measured by Milton Humason at Mt. Wilson. Though not called IC 80 by him, his finding chart points unambiguously to them. See the HMS 1956 AJ paper for the finding chart and redshifts.

― IC Notes by Harold Corwin

Object Note

IC 80 is made up of two galaxies, PGC4071 to the northeast and the slightly smaller PGC4072 10" to the southwest, the pair is on the northeast side of the cluster Abell 151, PGC4070 is 1' south, IC77 is 2' southwest, along with numerous fainter galaxies

Harold Corwin

MCG misidentified this as IC 77. See that for more. IC 80 itself is double; Javelle's position, though, points quite clearly at the brighter, northeastern component as the object he saw and measured. That position is a bit offset to the southwest; perhaps Javelle was somewhat influenced by the light of the companion?

― IC Notes by Harold Corwin

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