Other Names: SH2 162, Caldwell 11
Optics: Meade 10" LX200 ACF at f/11.1
Mount: Paramount MX using The SkyX Pro
Camera: QSI 683WSG
Filters: Astrodon Ha 3nm
Exposure: 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: Calgary, AB
Date: 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[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, 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.
[5] The star
SAO 20575 or
BD+602522 is thought to have a mass of 10-40
Solar masses