Delphinus is a rather barren constellation for deep sky objects. Probably the best is NGC 6934 a globular star cluster about 50,000 light years away and about 42,000 light years from the core of our galaxy. My notes from my log of the Herschel 400 shows I saw only a grainy core and no hint of resolution around the edges. Pretty much a dud even at 300x in a 10" scope though the night wasn't all that good. I don't recall ever looking at it again. So I decided to see what the CCD would show. Seeing was a tad better than average so I tried it at 0.5" per pixel rather than my usual 1" per pixel. Not sure if it helped or not. Stars look pretty fuzzy. The suddenly blue core caught me by surprise.
14" LX200R @ f/10, L=4x10' binned 1x1, RGB=2x10' binned 2x2, STL-11000XM, Paramount ME
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