Sh2-157 Lobster Claw Nebula

Higher resolution image

Image information:

Date: 08/19/2023
Equipment: Moravian C1+ 12000A camera through Pentax-M* 67 300mm F/4 ED (IF) lens using Altair QuadBand OSC filter on Losmandy GM8 mount. The lens was working at f4.
Image type: OSC
Exposure time: 90X180s, gain 40
Comment:  

Object information:

Object designations:
  • Lobster Claw Nebula, Sh2-157
  • Markarian 50, Mrk 50
  • NGC 7510
Object type:
  • Sh2-157 diffuse emission nebula
  • Mrk 50 open cluster
  • NGC 7510 open cluster
Object size:
  • Sh2-157 60' X 60'
  • Mrk 50 4'
  • NGC 7510 6'
Constellation: Cassiopeia
Comment:

Lobster Claw nebula, Sh2-157 is an emission nebula in the constellation of Cassiopeia. Part of the nebula surrounding the cluster Markarian 50 is hollowed out by intense stellar wind of its stars, including the Wolf-Rayet star WR57. WR stars are very hot and are generating very strong stellar winds. The nebula is some 11 kly distant, with diameter of about 240 ly.

Mrk 50 is a very young open cluster, only 7.5 million years old. It is 11 kly distant, with diameter of about 10 ly. Wolf-Rayet star WR57 is a notable member of the cluster.

NGC 7510 is another young cluster, about 10 million years old. It is 11 kly distant, with diabeter of about 15 ly.

NGC 7635, the Bubble Nebula is also visible in the image.

Related images:

List of related images:

Sh2-157 neighborhood, HaRGB, SBIG ST2000XM thorugh Tamron SP AF 180mm f/3.5 Di LD IF Macro telephoto lens

 

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