Harold Corwin

IC 1150 may be a re-observation of NGC 6018. As Malcolm Thomson notes, the description -- including the superposed star -- and the declination are good matches to Javelle's single observation in July of 1891. However, Javelle's RA is off by 48.7 seconds of time, an unusual error to make.

I searched the field for a star-galaxy pair with his observed separation (-20.90 seconds, -8.4 arcsec in north polar distance), but found none. Nor is there such a pair at -16 degrees, -6 degrees, +6 degrees, or +26 degrees as there would be if he made a digit error in his comparison star name (it is BD +16 2854). The only other galaxy Javelle found on the same night (IC 1155) is just where he observed it, so we are left with a mystery.

Whatever happened, I've included the identity with a question mark on the IC number. I'm obviously not completely satisfied with the identification, but certainly think it is possible.

― IC Notes by Harold Corwin

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