Derby and District Astronomical Society

NGC 281
The Pacman Nebula

Emission Nebula in Cassiopeia      RA 00h 52m 48s  Dec +56d 37m 00s

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Adrian Brown took the following two images of NGC 281 over multiple nights in August and September 2006. An ATIK ATK16HR CCD camera and a Skywatcher 80ED refractor at f7.5 was used to collect the data. The first is a colour image which was created from twenty-two 30 minute hydrogen-alpha and twelve 30 minute exposures taken through an Astronomik 13nm oxygen III filter. The hydrogen-alpha data was assigned to the red channel, the Oxygen III data was assigned to the blue channel and Adrian used Noel Carboni's Astronomy Tools Photoshop plugin to create a synthetic green channel. The black and white image is composed of twenty-two x 30 minute exposures taken with an Astronomik 6nm hydrogen-alpha filter.

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