Harold Corwin

IC 4625 = NGC 6240. The identity is sure; Barnard notes the star near north-following. I suspect a mistake in his computations, though this is one of the nebulae which he did not publish, but sent directly to Dreyer. Unless Barnard's letter still exists, we may never know for sure.

Reviewing this while adding Gaia DR2 positions in May 2019, I noticed that this has a double nucleus -- it shows up well in the Pan-STARRS1 images. So, I've split out the separate positions (where they exist) for the two nuclei, calling one "nN" (north nucleus) and the other "sN" (south nucleus).

Note, too, that the 10th magnitude star "close nf" seen by Barnard is NOT his famous high-proper-motion star. My comment, which I've rewritten, managed to lead me to believe it was for a few seconds. Hopefully, my new note, quoting Barnard explicitly, will be clearer.

― IC Notes by Harold Corwin

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