NGC 7635, also called the Bubble Nebula, Sharpless 162, or Caldwell 11, is a H II region emission nebula in the constellationCassiopeia. 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_☉^[4] SAO 20575 (BD+60 2522).^[7] The nebula is near a giant molecular cloudwhich 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.

Imaging telescopes or lenses: Orion ED80T CF
Imaging cameras: Atik 314L+ Mono
Mounts: iOptron iEQ-45
Software: DeepSkyStacker, PixInsight, Artemis Capture
Filters: Astronomik SII 12nm, Astronomik OIII 12nm, Astronomik H-alpha 12nm
Accessories: kwiq guider mini guide scope
Resolution: 1281×883
Dates: Sept. 3, 2014
Frames: 38×360″
Integration: 3.8 hours
Avg. Moon age: 7.95 days
Avg. Moon phase: 55.99%
RA center: 350.105 degrees
DEC center: 61.158 degrees
Pixel scale: 2.766 arcsec/pixel
Orientation: 177.331 degrees
Field radius: 0.598 degrees

Astrophotography of the day of SPONLI, 05.11.2014