NGC2392, The Eskimo Nebula in Gemini


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Description: This planetary nebula is very bright and relatively small, measuring 42 arc-sec. in diameter.  It has also been called the Clown Face Nebula.  The central star is magnitude 9.
Exposure Data: 2/22/2003.  RGB: 6x5m, 6x5m, 6x5m @ 1x1 binning. -20C, 0.56 arc-sec./pixel.
Processing: Acquired via Sequencer, reduced and aligned in Mira, sub-frames and calibration frames combined in Sigma, RGB:  3x CCDSharp, RGB combined 1.0:0.9:1.4 in Maxim, curves, levels, mild USM other processing in Photoshop.  10 darks, 20 bias and 10 flats per filter used in calibration, also combined in Sigma.
Optical System: 14.5 Ritchey-Chretien truss prototype by RCOS @ F/9, ST-8E USB NABG/CFW-8A CCD camera, AO-7 auto-guided, Paramount ME mount.
Comments: Seeing was 2.4 - 2.6 arc-sec.  Deconvolved to 1.7 arc-sec.