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Scope: C8 at f/3.3, Location: Del Mar, CA 6 January, 2007, Camera: Artemis285
Exposure: 8 x 480 sec H-Alpha (1x1), 8 x 90 sec RGB Exposures (2x2).
Processing: Images were captured with Artemis Capture (as FITs). Aligned/stacked in Registax 3 and saved as FITS. Luminance, H-Alpha and Color channels were scaled and color balanced in Astroart. Channels were co-registered in Astroart. Central gradient removal was performed in Astroart. Curves and Levels applied in Photoshop to optimize object features. Luminance construction consisted of the H-Alpha exposure. Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB) - G2V calibration factors were applied. Heavier than usual sharpening was applied on the nebula features. PixInsight SGBNR noise reduction was lightly applied to the background on both the luminance construction and the final result. Final Image size is approximately 1392x1040.
North is to the right in this image. IC443 is in the Constellation of Gemini. It is sometimes commonly called the "Jellyfish" Nebula. IC443 is a supernova remnant whose effects are still seen. This image is a close-up of the "head" of the Jellyfish, the complex extend again as much below this image field. An earlier image can be seen in the Archives here . The Archive image has a more extended view. The Horizontal FOV of this image is 46'.
Image center is located approximately - Equatorial 2000: RA: 06h 17m 20s Dec: +22°38'14"