Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  NGC 7510
Getting plate-solving status, please wait...
Sh2-157 - The Lobster Claw Nebula, 


            Michel Makhlouta
Sh2-157 - The Lobster Claw Nebula

Sh2-157 - The Lobster Claw Nebula

Technical card

Resolution: 4326x3275

Dates:Jan. 12, 2019Jan. 19, 2019Jan. 22, 2019Jan. 23, 2019Jan. 26, 2019Jan. 29, 2019Jan. 30, 2019Feb. 2, 2019Feb. 3, 2019Feb. 4, 2019

ZWO 31mm Ha 7nm: 107x180" (gain: 139.00) -20C bin 1x1
ZWO 31mm OIII 7nm: 102x180" (gain: 139.00) -20C bin 1x1
ZWO 31mm SII 7nm: 101x180" (gain: 139.00) -20C bin 1x1

Integration: 15.5 hours

Darks: ~24

Flats: ~50

Bias: ~200

Avg. Moon age: 20.62 days

Avg. Moon phase: 44.84%

Bortle Dark-Sky Scale: 5.00 job: 2537901

RA center: 348.679 degrees

DEC center: 60.072 degrees

Pixel scale: 1.613 arcsec/pixel

Orientation: 101.100 degrees

Field radius: 1.215 degrees

Data source: Backyard


I think this is my longest project in term of nights, but not in hours. It took 10 clear nights to gather 15 hours of usable data on the Lobster Claw Nebula. I initially intended to double that but the weather disagreed, and it seems I won't have clear nights for the remaining days where this target is visible from here.

Some details about this deep sky object:

Sh2 -157 is a weak emission nebula in the constellation of Cassiopeia, it is located on the arm of Perseus and approximately 11,000 light-years away from Earth. The nebula spans over a region of 212 light-years.

The ring shape is caused by the the stellar wind of several giant stars, while the brighter area appears excited by the light radiation of the stars of spectral class O. Inside there is a very young cluster of stars, which represents the last generation of a star formation process.

The small cluster of stars in the upper left area of the nebula is NGC 7510. On the right side, there is a is a planetary nebula - LBN 537. This region is on the border between constellations of Cepheus and Cassiopeia.

Comments and feedback is appreciated, as always.

Clear Skies!



Michel Makhlouta
License: None (All rights reserved)


  • Sh2-157 - The Lobster Claw Nebula, 


            Michel Makhlouta
  • Final
    Sh2-157 - The Lobster Claw Nebula, 


            Michel Makhlouta


reprocessed this from the scratch, changing the linear noise reduction workflow as well as the star reduction technique.

Sky plot

Sky plot


Sh2-157 - The Lobster Claw Nebula, 


            Michel Makhlouta

In these public groups

Sharpless2 Objects