Harold Corwin

There is no question about the identity of this galaxy: it is the southeastern of a line of three. Howe's micrometrically measured position was copied correctly into the IC, and is accurate.

The interesting thing about the object is that it has a star or compact galaxy superposed on the northern end. Zwicky included the compact object in his first list as "I Zw 6", but later withdrew it so that it does not appear in his "Red Book" (Catalogue of Selected Compact and Post-Eruptive Galaxies). A note on the back of his finding chart for the object shows that he thought it might be a star rather than a galaxy.

This pair of objects has also been confused with the middle (brightest) galaxy in the line, CGCG 385-099. It is clearly not that object, however, as both are included with their correct positions in a 1964 ApJ paper by Zwicky and Humason. Zwicky also refers on his finding chart to IC 1693 (though without the IC number) by the running number (32) from that paper. CGCG 385-099 is number 31, and it is not IC 1693.

― IC Notes by Harold Corwin

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