||Bright Diffuse Emission Nebula / Caldwell C11 / Sh2-162
||Ra 23h 21m 28s Dec +61° 17’3
|Size & Distance:
||15x15 Apx 7,100 light-years
|Date & Location:
||07-26-2014 Palomar Mountain, CA
||Hubble Palette SHO, Sll=R, Ha=G, Olll=B, 6ea. @ 10m, (bin 1x1). 3h Total
||Telescope Engineering Company APO180FL @ f/5.23 using an Astro-Physics TCC160 F/L 940mm
||Astro-Physics1200 GTO / ATS 10x36 Pier
||FLI-MLx694 @-20c / CFW2-7 / FLI-Atlas focuser / Guided by SBIG ST-I / w OAG.
||Astrodon 3nm Ha, Sll, Olll
||MaxImDL 6.03, Photoshop CS5
||Sky conditions: Average seeing, calm winds, Temp 75°
Image Field of view is 36 x 45 arc-min.
NGC 7635, also called the Bubble Nebula, Sharpless 162, or Caldwell 11, is a H II region emission nebula in the constellation Cassiopeia. The "bubble" is created by the stellar wind from a massive hot, 8.7 magnitude star. 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.