NGC 5921 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 5921 Picture Details: Optics             24-inch RC Optical Systems Telescope Camera           SBIG STL11000 CCD Camera Filters              Custom Scientific Dates               April 21st - April 24th 2009 Location          Mount Lemmon SkyCenter Exposure          LRGB = 210:60:50:60 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) Credit Line and Copyright        Adam Block/Mount Lemmon SkyCenter/University of Arizona