Harold Corwin

IC 242 is one of a double star. Javelle's position is not good enough to tell us which one, and his description, "eF, eS; nearly in contact with a very small star," does not give us relative positions, either. But it looks as though the proximity of the two stars misled him to seeing nebulosity where there is none. Since we can't tell which one he saw, I'm simply going to assign the number to both stars.

IC 243, found the same night, and less than 3 arcmin to the northeast, is well-measured with respect to the same comparison star, so there is no possibility of a mistaken comparison star for IC 242.

― IC Notes by Harold Corwin

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