Daily Archives: December 14, 2014

Bubble Nebula


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, 8.7magnitude 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 or BD+602522 is thought to have a mass of 10-40 Solar masses.

Telescope / lens shooting: GSO 8 “f / 5 Newton
Camera to capture: Canon EOS 1100Da
Mount: EQ6
Guides telescope / lens: GSO 8 “f / 5 Newton
Camera guide: QHYCCD QHY5
Filters: Astronomik EOS CLS Clip-In
Resolution: 1600×1062
Dates: August 18, 2012
Frames: 40×300 ”
Accumulation: 3.3 hours
Avg. Age of the Moon: 0.34 days
Avg. Phase of the Moon: 0.13%
RA Centre: 350.709 degrees
DEC center: 61.363 degrees
Pixel scale: 2,936 coal. sec / pixel
Direction: -161.299 degrees
Radius field: 0.783 degrees

Author: saiph

Astrofoto of the day from SPONLI, 14.12.2014