Harold Corwin

NGC 9 is a peculiar spiral with a bright blue patch on its southern arm, found by Otto Struve. Though Struve's position is about 3 arcmin off, his measurement of the star 6 arcmin east of the galaxy insures the identification. See NGC 8 for more on Struve's observations.

This galaxy may be a ring galaxy similar to NGC 985, though seen almost edge-on. The SDSS image (see e.g. Courtney Seligman's pages) doesn't conflict with this idea, though my initial thought that the blue knot on the southern side is an interacting companion now seems far less likely.

― NGC Notes by Harold Corwin

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