NGC281 in Cassiopeia
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Scope: C8  f/5 Location: Laguna Mountains, CA   1 October 2005  Camera: Artemis285

Exposure: 6 x 360 sec H-Alpha (1x1), 6 x 120 sec Baader IR  Block Filter (1x1), 6 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 (IR Block),  H-Alpha, and Color channels were scaled and rough color balanced in Astroart. Channels were co-registered in Astroart.  The H-Alpha exposure was the main exposure for the luminance construction. The 120 second IR Block exposure data was mainly used to enhance star depth on the luminance construction ( Blended background stars with the HA exposure data.)  Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB).  Color balancing and final touches were done in Photoshop.  Selective sharpening was done to enhance contrast using the Don Waid method. SGBNR was used to smooth background noise on the final result.  Final Image size is approximately 1392x1040.

All exposures in this image were guided; North is up in this image. NGC 281 is located in the constellation of Cassiopeia. It is an emission / reflection nebula. It is sometimes called the Pac Man Nebula due to its resemblance of the well known computer game character. This image replaces an earlier image which can be seen in the Archives here. Horizontal FOV is 30' 

Image center is located approximately - Equatorial 2000: RA: 00h 52m 59s Dec: +5637'19"

 

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