Name: NGC7635 - Bubble Nebula - Sharpless 162 - Caldwell 11
Date: 30 june 2013, 6 july 2013 & 31 october 2013
Exposure: 442min (7:22hr) ISO400, Subs: 8min with CLS filter & 6min with IDAS LPS P2 filter
Telescope: 8" Newton f/3.8 800mm with GPU f/4 coma corrector & Robtics coma corrector
Mount: NEQ6-pro, controled by EQmod/CdC, guided by QHY5/9x50 Finder Guider/PHD
Camera: Canon 450D Baader modified,
Location: Prinsenbeek, The Netherlands
NGC 7635, also called the Bubble Nebula, 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 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.