Back NGC6888Crescent Nebula in Emission-Line Click to display the full resolution Object InfoTypeSupernova RemnantConstellationCygnusDistance5,000 ly Capture DetailsDateJune 8, 2013LocationPalomar Mountain, CAExposureHa 10x15 (bin 1x1) EquipmentOpticsDSI RC10C Corrected RC AstrographFocal Length1867mm @f/7.3MountAstro-Physics 900GTOCameraQSI 683wsg-8FocuserBuilt-in Secondary FocuserFiltersAstrodon 3nm HaSoftwareMaxIm DL, CCDStack, Photoshop