SH2 162, Caldwell 11Optics:
Meade 10" LX200 ACF at f/11.1 Mount: Paramount MX
using The SkyX ProCamera: QSI 683WS-8Filters: Astrodon
Ha 3nm, OIII 3nm, SII 3nmExposure:
880 Mins or 14 2/3 hours, [16 x 1800s Ha, 9 x 1200s OIII, 11 x 1200s SII 1200s]Accessories:
Auto guided with Starlight Xpress Adaptive Optics
. FLI PDF focuser using FocusMax 3.8.0Location:
Taken over several nights from July 27 to September 15th, 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/29 Darks, 100 Bias, 50 Flats of each filter using a flat pannel.
CCD temperature was -25C. Image was taken from my backyard Observatory
Ha image: http://astromarina.zenfolio.com/p264248004/h29a2b670#h29a2b670NGC 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