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About this Image
The Pacman Nebula (NGC 281) is a complex area of star formation in Cassiopeia.
Prominent features include a small open cluster of stars, a diffuse red-glowing emission nebula, large lanes of dark obscuring gas and dust,
and dense knots of dust and gas in which stars may still be forming.
The open cluster of stars IC 1590 visible around the center has formed only in the last few million years.
16" cassegrain in secondary focus at f/10
|Camera||SBIG STL-11000M at -15-20C, internal filter wheel|
|Filters||Baader RGB + Ha 7 nm|
|Sky Conditions||mag 5.5 sky, FWHM 1.5-2", temperature 13-20 C,|
Ha= 480 min (30-minute sub-exposures); R:G:B= 40:40:40 min (10-minute sub-exposures)
|Programs used:||Maxim DL 4.5; CCDstack; Fitsliberator; Photoshop CS3; Neatimage|