Back NGC7293Helix Nebula in Emission-Line Click to display the full resolution Object InfoTypePlanetary NebulaConstellationAquariusDistance450 ly Capture DetailsDateSeptember 8, 2018LocationPalomar Mountain, CAExposureHa 11x15, OIII 6x15 (bin 1x1) as RGB EquipmentOpticsDSI RC10C Corrected RC AstrographFocal Length1867mm @f/7.3MountAstro-Physics 900GTOCameraFLI ML-6303EFocuserBuilt-in Secondary FocuserFiltersFLI CFW2-7, Astrodon Gen 2 LRGBSoftwareMaxIm DL, CCDStack, Photoshop