NGC 7822, Ha, Star 71 (Stephen Garretson)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: NGC 7822 · Sh2-171

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NGC 7822, Ha, Star 71

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NGC 7822, Ha, Star 71

I imaged this before in Ha on my "mentor's" suggestion, but always saw it as two separate objects, more complex on the left and more wispy on the right. I opted for complexity with the 132.

Yesterday as I was preparing for the session I looked at some Astrobin images of the target and wow...it's really one connected complex nebula. The Star 71 FOV frames it well. This is slightly over 4 hours of Ha. Perhaps will add a bunch more to see if I can bring the "connecting" gas clouds out more. Will also gather at least OIII and likely SII as well for HOO and/or SHO renderings.

The revised image is from twice the data, and a slight difference in processing.

3rd version has a bit more noise, but I felt the last two were over processed, looked soft. I would like to be able to reduce noise without creating that blurred softness. Pixinsight's MultiscaleMedianTransform, with the Adaptibe slider in Noise Reduction turned down to ~0.5 on all levels isn't bad, certainly a step in the right direction; but it's not there yet.

MorphologicalTransformation also softens the image. Probably deconvolving would be useful, reducing star size and bringing out finer detail, but I have not yet figured that out. More experimentation is needed.

Original
B
Final
C

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	2119307
PixInsight job	FD5SPP5RTK3T5R5R8PGG09K5OQJ80VN1
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	00h02m04s.15
RA (top/left)	00h13m55s.95
RA (top/right)	00h11m52s.22
RA (bottom/right)	23h48m54s.58
RA (bottom/left)	23h53m24s.84

Dec (center)	+67°40′43″.3
Dec (top/left)	+66°25′37″.6
Dec (top/right)	+69°07′30″.3
Dec (bottom/right)	+68°52′12″.5
Dec (bottom/left)	+66°12′00″.10

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NGC 7822, Ha, Star 71

NGC 7822, Ha, Star 71

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NGC 7822, Ha, Star 71

NGC 7822, Ha, Star 71

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