LOBSTER CLAW (SH2-157) & BUBBLE NEBULA (SH2-162) (Drew Evans)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: 4 Cas · Bubble Nebula · HD219286 · HD219634 · HD219854 · HD220016 · HD220056 · HD220057 · HD220074 · HD220102 · HD220130 · HD220147 · HD220167 · HD220180 · HD220369 · HD220760 · HD220770 · HD240248 · HD240250 · HD240256 · HD240267 · LBN 533 · LBN 536 · LBN 537 · LBN 540 · LBN 542 · LBN 543 · LBN 544 · LBN 547 · LBN 548 · And 22 more.

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LOBSTER CLAW (SH2-157) & BUBBLE NEBULA (SH2-162)

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LOBSTER CLAW (SH2-157) & BUBBLE NEBULA (SH2-162)

The Lobster Claw Nebula, or Sharpless 157 (Sh2-157), is an emission nebula, around 12,000 light-years from Earth between the Cassiopeia and Cepheus constellations. There are several interesting features in this nebula rich region, including the Bubble Nebula, NGC 7635 (or Sh2-162), a HII region emission nebula which lies in a surrounding shell, and excited by the star SAO 20575. Also in the frame are the Wolf-Rayet massive star WR 157, two large open clusters of stars NGC 7510 and NGC 7654, and the nebula NGC 7538, which is home to the largest yet discovered protostar, 300 times the size of our solar system!

This image was captured over the span of a week totaling 14.2 hours in narrowband. Each filter was mapped to the Hubble Palette.

OTA: William Optics GT81 using 0.8x Flat6A-81 reducer
Mount: Celestron CGX-L
Camera: ZWO ASI294MM Pro
Gain: 100

Night 1
3nm Sii 22x600s
3.7 hours

Night 2
7nm Oiii 30x600s
5 hours

Night 3
3nm Ha 22x900s
5.5 hours

14.2 hours total

Cooling Temperature: -10 Celsius
Auto-guiding: ZWO ASI174MM Mini and ZWO M48 OAG
Control: ZWO ASIAIR Pro

Flagstaff, AZ - Bortle 4 skies

Calibrated in Astro Pixel Processor⁣ with darks and flats

Processed in Pixinsight and Lightroom

#astrophotography #OPTeam #ASIWEEK

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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.
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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	5074722
PixInsight job	IZQC53WOIVOEBGM1CWXND8265EK4J49V
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h16m57s.44
RA (top/left)	23h25m49s.82
RA (top/right)	23h25m56s.93
RA (bottom/right)	23h07m10s.79
RA (bottom/left)	23h08m49s.50

Dec (center)	+61°03′59″.9
Dec (top/left)	+59°26′04″.10
Dec (top/right)	+62°42′51″.6
Dec (bottom/right)	+62°39′01″.3
Dec (bottom/left)	+59°22′37″.1

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LOBSTER CLAW (SH2-157) & BUBBLE NEBULA (SH2-162)

LOBSTER CLAW (SH2-157) & BUBBLE NEBULA (SH2-162)

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LOBSTER CLAW (SH2-157) & BUBBLE NEBULA (SH2-162)

LOBSTER CLAW (SH2-157) & BUBBLE NEBULA (SH2-162)

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