Sh2-157 "Lobster Claw" Region (Jim Thommes)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: Bubble Nebula · NGC 7510 · NGC 7538 · NGC 7635 · The star 2 Cas

Sh2-157 "Lobster Claw" Region, Jim Thommes

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Sh2-157 "Lobster Claw" Region

Link: http://www.jthommes.com/Astro/Sh2-157_HOO.htm

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Sh2-157 "Lobster Claw" Region

Link: http://www.jthommes.com/Astro/Sh2-157_HOO.htm

North is to the right in this image. This image shows the emission nebula Sh2-175 (also known as LBN 536 and commonly called the "Lobster Claw") . Included in the image is NGC 7635 (also known as Sh2-162, LBN 548, and commonly called the "Bubble Nebula"). Other objects are the compact HII region Sh2-157B / LBN 537; LBN 533, 540, 544, and 549; Sh2-159; NGC 7510 (open cluster); NGC 7538 (IR Cluster ad HII region). Also included are dark nebulae LDN 1225 and 1231. The northern portion of Sh2-157 ("Claw") is ionized Wolf-Rayet star - WR 157; the southern portion (base of "Claw") may be ionized by multiple stars in that region. The distance of the overall Sh2-157 structure is estimated to be about 8,100 to 13,700 light years distant. These objects and some of the brighter stars are identified in the annotated image.

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