The Pacman Nebula (NGC 281)

Posted by CraigAndTammy
on Friday, October 2, 2009

by Craig and Tammy Temple


NGC 281 is an open cluster with nebulosity in the constellation Cassiopeia. The emission nebula has a resemblance to the video game character "Pacman", hence it's name. This is an extremely faint object, even though it has an apparent magnitude of 7.00. It's brighness is spread-out over an area that is almost 35 arcminutes. The Pacman Nebula is about 10,000 light-years away.

Telescope: 10” Orion Newtonian at f/4.7
Accessories: Baader MPCC
Mount: Orion Atlas EQ-G controlled by EQMOD
Guiding: Orion StarShoot AutoGuider on William Optics ZS66
Camera: Self-modified Canon Digital Rebel XT
Filters: Astronomik CLS-CCD EOS Clip
Exposure: 76 x 180sec @ ISO 800 (3hr. 48min.)
Acquisition: ImagesPlus 3.75 Camera Control
Processing: ImagesPlus 3.75 – Calibrated, registered, Sigma-clipped averaged, DDP
Post-processing: Adobe Photoshop CS4; Gradient XTerminator; Noise Ninja, Noel Carboni's Tools
Date(s): September 9 & 27, 2009
Temperature(s): 74ºF & 70ºF

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