Back NGC281Pacman Nebula in Emission-Line Click to display the full resolution Object InfoTypeNebulaConstellationCassiopeiaDistance10,000 ly Capture DetailsDateSeptember 5, 2013LocationCarlsbad, CAExposureHa 9x20 (bin 2x2)NotesImage scale of 1.2 arcsec/pix EquipmentOpticsDSI RC10C Corrected RC AstrographFocal Length1867mm @f/7.3MountAstro-Physics 900GTOCameraQSI 683wsg-8FocuserBuilt-in Secondary FocuserFiltersAstrodon 3nm HaSoftwareMaxim DL, CCDStack, Photoshop