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Name / Constellation

NGC 7635

Other: C 11; Sh2-162; GC 4947; Bubble nebula

Cas

Coordinates AR: 23h 20m 45.5s - Dec: +61° 12′ 45″
Optics Takahashi FSQ 106N APO Fluorite F5 - 60/220 guiding refractor
Camera-Mount SBIG STF8300M - Orion StarShot Guider - 10Micron GM2000 QCI Mount
Filters Baader Ha - Oxy3
Exposure
  • H alpha
  • Oxy 3
  • 24 x 900 sec - 6 hours
  • 24 x 900 sec - 6 hours
  • UNBINNED
  • UNBINNED
Location / Date Promiod (Valle D'Aosta-Italy) "TLP" Remote Observatory - 28/29 sept 2019
Seeing About 3" @ 2.1 arcosec/pixel unbinned
Note Bi-color palette
Acquisition MaxIm DL - CCD Autopilot 5
Processing Adobe Photoshop CS6 -
Comment

NGC 7635, also known as the Bubble NebulaSharpless 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. It was discovered in 1787 by William Herschel. The star BD+60°2522 is thought to have a mass of about 44 M☉.