Back NGC1491NGC1491 Nebula Click to display the full resolution Object InfoTypeEmission NebulaConstellationPerseus Capture DetailsDateNovember 10, 2018LocationLittle Blair Valley, Anza-Borrego Desert, CAExposureSII 6x20, Ha 6x20, OIII 6x20 (bin 1x1) as RGB EquipmentOpticsDSI RC10C Corrected RC AstrographFocal Length1867mm @f/7.3MountAstro-Physics 900GTOCameraFLI ML-6303EFocuserBuilt-in Secondary FocuserFiltersFLI CFW2-7, Astrodon 3nm SII, Ha, OIIISoftwareMaxIm DL, CCDStack, Photoshop