Harold Corwin

IC 5154 is apparently a "ring galaxy", an object that is apparently the result of a collision between a spiral and an elliptical or spheroidal. This structure shows up best in this case on the DSS2 red image where the annulus is south of two brighter knots. Other examples include NGC 1143/44 and IC 298 (all of which see).

Since the automated surveys don't see the fainter center of the ring, I've adopted my own position from the red DSS2 for that object, and have adopted the mean for the entire IC 5154 system from my own estimates. 2MASS, GSC3, and UB10, of course, have positions for the two knots to the north, and I've adopted the 2MASS PSC positions for them.

― IC Notes by Harold Corwin

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