In Camelopardalis there is a long streak of dark nebulosity that spans just over 3°. It doesn’t appear in any of the photos in Barnard’s
A Photographic Atlas of Selected Regions of the Milky Way, but he cataloged it nonetheless as B8, B9, B11, and B13. Barnard provided a description: “…a great vacancy extending east and west, the continuous part of which is 2 1/2° long and about 1/2° wide. It really extends in a more or less broken form for about 6°.” But because he didn’t provide sizes for each entry, we can’t quite pin down what area each entry correlates to. I presume it is the darkest four patches within the streak, with B8 to the west and B13 on the east end, but the locations he provided don’t quite match the darkest areas. B12 is at the very bottom.
There is a roughly circular patch of nebulosity, presumably an HII region, centered approximately on 1 Camelopardalis with a diameter of about 4°. You can see the top third of it taking up most of the bottom left of this image. I can’t determine if it has a catalog entry anywhere. It’s not in the Sharpless catalog nor Lynds’. If anybody knows the designation, please let me know.
@Göran Nilsson ’s
image of this area reveals the very faint fragments (barely visible with my much shorter H-alpha integration time) of SNR G150.3+4.5. I took some SII and OIII, where it can be faintly seen, but I didn't incorporate those channels here.
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