NGC 7331 Space Recent Nebulae Galaxies Star Clusters Solar System Other Facilities Nature People Programs SkyNights DiscoveryDays SkyCamp (Click the image above for the largest available version.) NGC 7331 Picture Details: Optics             24-inch RC Optical Systems Telescope Camera           SBIG STL11000 CCD Camera Filters              Custom Scientific Dates               September 10th-13th 2009 Location          Mount Lemmon SkyCenter Exposure          LRGB = 180:100:90:100 minutes Acquisition       ACP Observatory Control Software (DC-3 Dreams),TheSky (Software Bisque), Maxim DL/CCD (Cyanogen) Processing        CCDStack (CCDWare), Mira (MiraMetrics), Maxim DL (Cyanogen), Photoshop CS3 (Adobe) Guest Astronomers:                   September 2009 Image Processing Workshop Participants Credit Line and Copyright        Adam Block/Mount Lemmon SkyCenter/University of Arizona