SH2 162, Caldwell 11Optics:
Meade 10" LX200 ACF at f/11.1 Mount:
Paramount MX using The SkyX ProCamera:
Astrodon Ha 3nmExposure:
440 Mins or 7 1/3 hours, [4 x 1800s, 15 x 1200s, 2 x 600s]Accessories:
Auto guided with Starlight Xpress Adaptive Optics and Lodestar. FLI PDF focuser using FocusMax Location:
Taken over 5 nights from July 27 to August 12th, 2014 Notes:
Image acquisition with Maxim DL Pro. Processing: Image calibration, align, and combine in Maxim DL Pro. Levels, curves, cosmetic adjustments and crop/resize in Photoshop.
Calibrated w/24 Darks, 100 Bias, 50 Flats using a flat pannel.
CCD temperature was -25C. Image was taken from my backyard Observatory.NGC 7635
, also called the Bubble Nebula
, Sharpless 162
, or Caldwell 11
, is a 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
, the 15 ± 5 M☉
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 SAO 20575
is thought to have a mass of 10-40 Solar masses