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NGC 7635, also called the Bubble Nebula, Sharpless 162, or Caldwell 11, is a H II region[2] 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[2] magnitude young central star, the 15 ± 5 M[4] SAO 20575 (BD+60 2522).[7] 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.[7] It was discovered in 1787 by William Herschel.[6] The star SAO 20575 or BD+602522 is thought to have a mass of 10-40 Solar masses.
[Ref: Wikipedia]


 

Image Details

  Cocoon Nebula

Imaging Details
NGC Number:
NGC 7635

Common Name(s):
Bubble Nebula

Other Designations:
Sharpless 162, or Caldwell 11

Object Type:
Emission Nebula

Object Class:
Nebula

Constellation:
Cassiopeia

RA / 
23h 20m 48.3s
Dec:
+61° 12′ 06″

Distance from Earth:
11,000 ly

Object Size:
~ 15 x 8 arcmin

Magnitude:
~ 10 V
 Bubble Nebula
Date:
November 15, 2011 


Location:
Auburn, IN  46706
(41° 18' 37.8" N, 85° 04' 21.6" W)


Equipment:
RC-16 2 f/8.5
SBIG ST11000M
Mathis MI-750 Fork Mount

Integrations:
Ha  :  5 x 6 min
     
     
     
     


Software:
Maxim/DL 4.57
AIP4Win v2
Photoshop CS3