NGC 2539 in Puppis
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Scope: C8  f/2.8;  Location:  Del Mar  CA;  4 Apr. 2005; Camera: ToUcam SC3

Exposure: 16 x 30 sec and 16 x 10 sec with Orion Skyglo  and Baader IR Block  for Luminance exposures; 16 x 15 sec R,G,B exposures.

Processing: All exposures captured  in K3CCDTools 2. Alignment and stacking was done with Registax 3 and saved as FITs. LRGB channels were co-registered in IRIS. Luminance and Color channels were scaled and rough color balanced in IRIS.  The  luminance channel was constructed with the with the 30 sec exposure as the base exposure; the 10 sec exposure was used to reduce star size on the larger stars.  LRGB channels were resized to 800x600 prior to LRGB combine. Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB). Color balancing and final touches were done in Photoshop (Blue halo subtraction and background noise subtraction). SGBNR (PixInsight LE) was used to smooth remaining background  on the final result. Final image size is approximately 800x600.

This image was a guided exposure. NGC 2539, located in the constellation Puppis, is the cluster in the image. NGC 2539 roughly center in this image is estimated to be 4,000 light years distant. The bright star in the lower left is "19 Puppis" and is estimated to be only 185 light years distant - so it is a foreground star.  North is up in this image.  T. Horizontal FOV is about 30'. 

Image center is at Equatorial 2000: RA: 08h 10m 37s Dec: -1249'14"

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

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