Abell 71, VDB 134, and PK 86+ 51 (rhedden)

Abell 71, VDB 134, and PK 86+ 51

This image captures a region in Cygnus not far from the star Deneb, which contains two interesting planetary nebulae and a reflection nebula. The background H-alpha emission belongs in part to SH2-115.

Abell 71 is the rather obvious, somewhat circular object at the left center of the image. It measures about 2.6 arcminutes in diameter and shines at about 14th magnitude. Interestingly, this nebula shows a blue center in some peoples’ HOO narrowband images, but it just appears solid red in this HRGB image. There was a very weak signal from this object in the blue channel, which was overwhelmed by the red signal after RGB combination.

PK 86+ 5.1 is the other interesting planetary nebula in this image. It is slightly larger than Abell 71, but it is a bit harder to spot. Look for a small bubble lurking in the hydrogen emission to the upper left of the bright blue star HIP 101138. I think this PN is quite a bit fainter than Abell 71, though I could not find a magnitude estimate, and it camouflages quite well with its background.

VDB 134 is a faint reflection nebula around HIP 101138, which showed up best in the blue channel and might benefit from addition of some O-iii data at some future point. Since H-alpha was used as luminance in this image, it only appears as a region of slightly blue color around the bright star.

This imaging project was cut short by rain and forest fire smoke, which I am sure is not a surprise to many of you. I was able to get one full night of clear sky with minimal smoke, plus two additional hours of H-alpha data taken through moderate smoke. I feel fortunate that I was able to finish an image at all during this past month.

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Status	Basic success
Started	...
Astrometry.net job	4786385
PixInsight job	n/a
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Abell 71, VDB 134, and PK 86+ 51

Abell 71, VDB 134, and PK 86+ 51

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Abell 71, VDB 134, and PK 86+ 51

Abell 71, VDB 134, and PK 86+ 51

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