Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  Bubble nebula  ·  M 52  ·  NGC 7635  ·  NGC 7654
Bubble Nebula and M52 (version 1), Prabhakar
Bubble Nebula and M52 (version 1)
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Bubble Nebula and M52 (version 1)

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Description

GC 7635, also called the Bubble Nebula, Sharpless 162, or Caldwell 11, is a H II region emission nebula in the constellation Cassiopeia. It lies close to the direction of the open cluster Messier 52. The "bubble" is created by the stellar wind from a massive hot, 8.7 magnitude young central star.

The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow.

Messier 52 (also known as M 52 or NGC 7654) is an open cluster in the Cassiopeia constellation.

Due to interstellar absorption of light, the distance to M 52 is uncertain, with estimates ranging between 3,000 and 7,000 light years. One study identified 193 probable members of the cluster, with the brightest member being magnitude 11.

Messier 52 is evaluated at about 35 million years old.

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Image captured at Kissimmee Prairie State Park, Florida

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Bubble Nebula and M52 (version 1), Prabhakar