The Bubble Nebula's region

Bubble Nebula

NGC 7635, also known as the Bubble Nebula, Sharpless 162, or Caldwell 11, is an 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

 Technical Data


Bortle Scale / SQM-L Bortle  5  / ---
Period July 2016
Primary Scope FSQ106/530
Camera KAF8300
Mount NEQ6
Exposure Time 5,5H
Composition LHRGB
Location Val Imagna (Bergamo) Italy 




 © Efrem Frigeni Astrophoto

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