Bubble Nebula (NGC 7635)
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NGC 7635, also known as the Bubble Nebula, Sharpless 162, or Caldwell 11, is a H II region[1] 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[1] magnitude young central star, 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.


  • Location: Harold Campbell Everglades
  • Scope: Vixen VMC200L
  • Camera: Fli ML8300 with CFW2-7 and Astrodon Filters
  • 600 sec LUM / 300 sec subs RGB bin 2 for 4 hours and 1 hour of HA 600 sec in Maxim DL
  • Combined in Maxim DL and processed in Pixinsight
  • Taken 10/21/16