NGC 7331 and Deer Lick group in Pegasus LRGB. (Pat Rodgers)

Celestial hemisphere: Northern · Constellation: Pegasus (Peg) · Contains: NGC 7331 · NGC 7333 · NGC 7335 · NGC 7336 · NGC 7337 · NGC 7338 · NGC 7340

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NGC 7331 and Deer Lick group in Pegasus LRGB.

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NGC 7331 and Deer Lick group in Pegasus LRGB.

Always been a favourite Galaxy of mine. NGC 7331 with the more distant Deer Lick group, plus a host of other fuzzies, make for the gem of Pegasus.

I've been taking subs for this since September this year, when it's an early evening object, the last subs were from the 3rd of December where it's past the meridian as darkness falls. Alas clear moonless nights have become rare as hens teeth in this period, so just shy of six hours survived from the nine odd hours of subs.

Rev A: Is the RGB with my Luminance. As you can see the core is blown even with just 600s Luminance subs and HDRMT has no effect for some reason. The rest of the image looks fine.

Rev B: Is my RGB data but with an extracted Luminance added to the HDRMT enhanced coloured image. The tool works fine on the 600s subs? Giving a nice core. The Ex Lum adds to the RGB but of course not as much as a proper Luminance.

Rev C: Is the minimum, Maximum of both images using Pixel Math.

B

Description: ExLum_RGB with the better core.

Uploaded: ...

C

Description: The pixel Math minimum, maximum of A and B with the rescued core for the final image.

Uploaded: ...

D

Description: Image C with a little histograph stretch, and an unsharp mask ( thanks Marcus.) Plus a gentle lift of the blue channel using a starless galaxy mask.

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E

Description: The new scope hasn't arrived yet. So took another 2 hours for this last night with the 200p.

Uploaded: ...

F

Description: Noticed ringing around the smaller stars in the galaxy and dark spots in the larger stars. Re-processed this but ended up going to town.

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Status	Advanced success
Started	...
Astrometry.net job	2408848
PixInsight job	370IGXOZB5GBUP9VMJQP1E5JNZK349K5
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	22h37m04s.34
RA (top/left)	22h35m54s.91
RA (top/right)	22h36m35s.20
RA (bottom/right)	22h38m13s.44
RA (bottom/left)	22h37m33s.90

Dec (center)	+34°25′00″.6
Dec (top/left)	+34°36′21″.10
Dec (top/right)	+34°07′46″.6
Dec (bottom/right)	+34°13′36″.9
Dec (bottom/left)	+34°42′13″.9

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NGC 7331 and Deer Lick group in Pegasus LRGB.

NGC 7331 and Deer Lick group in Pegasus LRGB.

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NGC 7331 and Deer Lick group in Pegasus LRGB.

NGC 7331 and Deer Lick group in Pegasus LRGB.

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