Narrowband NGC 281 | Timo-Pekka Metsälä

Timo-Pekka Metsälä
Location of photo
Espoo, Finland
Date/Time of photo
August 11, 2006
Takahashi FS-102NSV refractor on a Takahashi EM-200 German equatorial mount, Atik ATK-16HR CCD camera. True Technology SupaSlim Filter Wheel Astronomik S-II, H-alpha and O-III filters.
"The Pacman Nebula" NGC 281 in Cassiopeia with narrowband emission line filters. The red color represents ionized sulphur (S-II), green is ionized hydrogen (H-alpha), and the blue is doubly ionized oxygen (O-III). The total exposure time is 3 hours.
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