DSLR astrophotography by Sergi Verdugo
The Pacman Nebula
Exposure: 3×600″ @ ISO 800 (RGB) + 48×600″ @ ISO 1600 (Ha)
Telescope: Skywatcher Newton 8″ f5 with Baader MPCC
Filter: Baader UV/IR cut 2″ and Baader H-alpha 7nm 2″
Mount: Skywatcher EQ6 Pro
Camera: Modded Canon 350D in cooler box
Date: August 2009
Location: Rasos de Peguera (RGB) and Cabrera de Mar (Ha) (Barcelona, Spain)
Comments: I could only get 3 RGB exposures in the field, but they were sufficient to give colour to the whole image.
NGC 281 is an H II region in the constellation of Cassiopeia and part of the Perseus Spiral Arm. It’s a red diffused nebula about 2 degrees east of alpha Cas. It includes the open cluster IC1590, the multiple star HD 5005, and several Bok globules. Colloquially, NGC 281 is also known as the Pacman Nebula for its resemblance to the video game character. It is about 9500 light-years away from the Earth.