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Coordinate Confusion with NGC 4437...and 4417 and 4517.
Last night I acquired 2 hours on data of NGC 4437. After processing the galaxy looked rather different from what I expected. After a bit of research I found that the coordinates that ACP uses are actually the coordinates of NGC 4417!!
In addition, NGC 4437 and NGC 4517 are actually the same galaxy. The confusion stems from a handwriting error that dates back to 1940! See the two pictures of the Seligman Atlas:
Attachment 12488Attachment 12489
So, I will now try again using NGC 5417 in ACP, these coordinates are correct and will yield the desired object.
Roelof