Image centered on Ra 23-21-00 Dec16-21-48
Bubble Nebula (NGC 7635)
Information
NGC 7635 is an Emission Nebula located in the Constellation Cassiopeia. The bubble is approximately 10 light years across and the result of a massive star exerting pressure on the surrounding gas cloud resulting in an expanding "bubble" of hydrogen gas. The Hydrogen gas glows very dimly in the deep red end of the spectrum due to Ultraviolet ionization of the Hydrogen Molecules. Also located nearby but out of the field of view is the open star cluster M52, see sky map for location
Optics - Exposure information
Telescope, Vixen R200ss 8 inch Newtonian at F4 (Fl 800mm) with a Televue Coma Corrector and aftermarket Moonlite accessories focuser.
Mount, Losmandy G11 with Gemini control electronics
Imager, Starlite-Xpress SXV-h9 using Astronomiks RGB and Schuler Ha optical filters.
Exposure data, Ha = 90 minutes total with 5 min subexposures, RGB = 15 min each with 2 min subexposures. Final RGB composite image = (Ha+R)Gb.
Images acquired with Astroart and aligned then combined in Maxim Dl. Final RGB composite processed with Photoshop Cs
Images acquired from my backyard - " Dirt Clod Observatory" in Antelope California
