Sharpless 2-140, 2-141 and 2-145 (partial) (matthew.maclean)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: 25 Cep · HD210808 · HD211029 · HD211123 · HD211242 · HD211283 · HD211758 · HD211781 · HD211880 · HD212042 · HD212169 · HD212365 · HD212413 · HD212495 · HD212730 · HD212882 · HD213023 · HD213048 · HD213099 · HD213242 · HD213353 · PGC 97260 · Sh2-140 · Sh2-141 · Sh2-145 · The star 25 Cep · VdB153

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Sharpless 2-140, 2-141 and 2-145 (partial)

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Sharpless 2-140, 2-141 and 2-145 (partial)

I managed a few hours of capture during a very stormy June and made an impulsive target selection just to see what I could get. I centered on 2-140, but 2-141 is in the lower-right corner at least a good portion of 2-145 is in the frame too. The sky conditions followed a very sudden clearing immediately after a storm, so I think there was still a lot of residual wind shear in the atmosphere such that this was possibly among the worst seeing conditions I've yet experienced. Once integrated, the stars were so distorted that they were un-usable. Since the main data was acquired with a dual-band filter anyway, I just eliminated them. Probably the nebula isn't too strongly affected other than maybe losing some fine-scale detail. I luckily had a brief one-hour clearing a week later and dashed out to collect a few quick frames with my L-Pro that I could use for star replacement.

I am still really liking the ALP-T filter, it can really pick up a lot of nebulosity. The background is still a little noisy, so I could use more integration time, but, overall, I think it was a good capture. I performed a little H-O-O color re-balance from the raw data just to give it more interest instead of being just solid red.

Northeast Imagers
William Optics GT Series
Sharpless2 Objects
Light Polluted skies
Duo-band, Tri-band, and Quad-band Imaging

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Status	Advanced success
Started	...
Astrometry.net job	5862365
PixInsight job	B9S86QPRPTOJSDIG0P6XAOFJI1X0QTGP
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h19m57s.74
RA (top/left)	22h10m04s.80
RA (top/right)	22h10m40s.95
RA (bottom/right)	22h28m44s.75
RA (bottom/left)	22h30m24s.40

Dec (center)	+63°06′49″.2
Dec (top/left)	+64°49′15″.9
Dec (top/right)	+61°24′16″.2
Dec (bottom/right)	+61°21′56″.10
Dec (bottom/left)	+64°46′40″.7

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Sharpless 2-140, 2-141 and 2-145 (partial)

Sharpless 2-140, 2-141 and 2-145 (partial)

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Image Index:

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Sharpless 2-140, 2-141 and 2-145 (partial)

Sharpless 2-140, 2-141 and 2-145 (partial)

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Sky plot

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