NGC 7331 (also known as Caldwell 30) is a spiral galaxy about 40 megalight-years (12 Mpc) away in the constellation Pegasus. It was discovered by William Herschel in 1784. NGC 7331 is the brightest member of the NGC 7331 Group of galaxies. [Description from Wikipedia] The galaxy is similar in size and structure to the galaxy we inhabit, and is often referred to as "the Milky Way's twin", although recent discoveries regarding the structure of the Milky Way may call this similarity into doubt Technical Details: (RA, Dec) center: (339.271585999, 34.4194478982) degrees Orientation: 0.20016608734 deg E of N Pixel scale: 0.651006126966 arcsec/pixel Acquired on August 10, 2013 from Blue Canyon, Ca L: 8 x 20m R,G,B:8 x 10m each (2x2 bin) Pixel scale: 0.65 arcsec/pixel Total exposure time: ~6.5 hours Main Camera: QSI 583 WSG Guide Camera: SXV Lodestar (on OAG) Mount: Astro-Physics Mach 1 Scope: Celestron Edge HD 8" (FL: 2145 mm) SXV Adaptive Optics Image Aquisition software MaximDL Registed, Calibrated and Stacked in MaximDL Post Processed entirely with PixInsight 1.8
LRGB data Acquired on August 31, 2013 from Lake Sonoma, Ca L: 8 x 20m R,G,B:8 x 10m each (2x2 bin) Pixel scale: 0.65 arcsec/pixel Ha data acquired from Corralitos, CA Ha: 16 x 30m Main Camera: QSI 583 WSG Guide Camera: SXV Lodestar (on OAG) Mount: Astro-Physics Mach 1 Scope: Celestron Edge HD 8" (FL: 2145 mm) SXV Adaptive Optics Image Aquisition software MaximDL Post Processed in PixInsight 1.8
