Lobster Claw Nebula Sh2-157 (Kanwar Brar)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD218997 · HD219286 · HD219287 · HD219460 · HD219854 · HD240233 · HD240244 · HD240245 · HD240248 · HD240250 · HD240252 · HD240253 · HD240256 · LBN 533 · LBN 536 · LBN 537 · LBN 540 · LBN 544 · NGC 7510 · Sh2-157

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Lobster Claw Nebula Sh2-157

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Lobster Claw Nebula Sh2-157

Lobster Claw Nebula is an emission nebula in the constellation Cassiopeia, at a distance of approximately 11050 light years from the Earth. The predominantly yellow part of the nebula is a very large H II region that is ring-shaped by the stellar wind of several giant stars, including the bright and very young Wolf-Rayed star WR 57. The blue colored regions at the right part of the image mainly consist of highly ionized oxygen (OIII) and other gases.

The data was captured on multiple nights in August and total capture time is around 19 hours...

Bortle:6
Darks:20
Flats:20
Dark Flats:20
Astrodon Ha 36nm: 65*500
Chroma OIII 36mm: 30*500
Chroma SII 36mm: 47*500

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Other
Unknown

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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	6222950
PixInsight job	56FTE7JJSM3YAS5XMYXTVYPAGR8FXQ5I
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h15m12s.188
RA (top/left)	23h19m19s.927
RA (top/right)	23h19m15s.816
RA (bottom/right)	23h10m53s.166
RA (bottom/left)	23h11m19s.786

Dec (center)	+60°04′19″.94
Dec (top/left)	+59°18′58″.42
Dec (top/right)	+60°50′29″.65
Dec (bottom/right)	+60°49′09″.85
Dec (bottom/left)	+59°17′43″.28

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Lobster Claw Nebula Sh2-157

Lobster Claw Nebula Sh2-157

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Lobster Claw Nebula Sh2-157

Lobster Claw Nebula Sh2-157

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