Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  Bubble nebula  ·  M 52  ·  NGC 7635  ·  NGC 7654
NGC 7635 and M52, Lee Harris
NGC 7635 and M52
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NGC 7635 and M52

NGC 7635 and M52, Lee Harris
NGC 7635 and M52
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NGC 7635 and M52

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Description

NGC 7635, also known as 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, SAO 20575 (BD+60°2522). 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. It was discovered in 1787 by William Herschel.

Also Messier 52 (M52) is a bright open cluster located in the northern constellation Cassiopeia. The cluster has an apparent magnitude of 5.0 and lies at an approximate distance of 5,000 light years from Earth. It has the designation NGC 7654 in the New General Catalogue.

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NGC 7635 and M52, Lee Harris