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About this Image
This stellar relic, first spied by William Herschel in 1787, is nicknamed the "Eskimo" Nebula (NGC 2392).
When viewed through ground-based telescopes, it resembles a face surrounded by a fur parka.
The "parka" in fact is a disk of material embellished with a ring of comet-shaped objects, with their tails streaming away from the central, dying star.
16" cassegrain in secondary focus at f/10
|Camera||SBIG STL-11000M at -20C, internal filter wheel|
|Date||Feb 19-25, 2008.|
|Sky Conditions||mag 5 sky, 1.3-1.5" raw FWHM for center frames|
center exposures: L: 30x60 sec, R:G:B = 960:600:960 sec (12o sec sub-exposures)
full frame: L:R:G:B = 60:120:80:120 min (20 min sub-exposures)
Image aquisition in Maxim DL 4.6; Preprocessing and deconvolution in CCDStack;
wavelet filtering for center frames; further processing in Photoshop CS3;