NGC 246 in Cetus


Scope: C8 at  f/5 Location: Dos Picos Park, Ramona, CA;   14  Dec. 2004; Camera: ToUcam SC3

Exposure: 16 x 20 sec and 16 x 60 sec exposures with IR  block filter 8 x 60 sec each RGB exposures.

Processing: Images were captured in K3CCDTools 2. Aligned/stacked in Registax 3 and saved as FITS. Luminance and Color channels were scaled and rough color balanced in Astroart. Channels were co-registered in Astroart. The 60  sec  exposure was used as the base Luminance channel. The shorter Luminance exposure was used to reduce star size on the brighter stars.  Luminance and Color FITS were combined in Photoshop with Luminance Layering. Color balancing and final touches in Photoshop. SGBNR (PixInsight LE) was used to smooth background noise on  the luminance channel and the final result. Resized to approximately 720x540.

This image was guided. NGC 246 is a planetary nebula. Planetary nebula are formed when a central star ejects mass and then excites that expanding gas front. Planetary nebula are rather short lived compared to stellar life spans - they remain visible for only 10's of thousands of years. Horizontal FOV is 16'


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All images and content remain the property of Jim Thommes - copyright 2003, 2011

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