Back M13Great Cluster in Hercules Click to display the full resolution Object InfoTypeGlobular ClusterConstellationHerculesDistance25,100 ly Capture DetailsDateJuly 15, 2004LocationCarlsbad, CAExposureL 10x30, R 10x30, G 10x30, B 10x30 (bin 1x1) EquipmentOpticsCelestron C11 Carbon Fiber SCT w/XLTFocal Length1764mm @f/6.3MountCelestron CGECameraSBIG ST-2000XMFocuserOptec TCF-SFiltersCFW8A, SBIG LRGBSoftwareCCDSoft, Photoshop