NGC 3184 in Ursa Major



Scope: C8 f/8; Location: Dos Picos Park, Ramona, CA; 15 March, 2007; Camera: Artemis285

Exposure: 8 x 330 sec  Luminance exposures with IR Block Filter (bin 1x1); 6 x 120 sec RGB (bin 2x2) 

Processing: Images were captured in Artemis Capture (as FITs). Aligned/stacked in Registax 4 and saved as FITS. Luminance and Color channels were numerically scaled and  color balanced in Astroart.  Channels were co-registered in Astroart.  Luminance and RGB exposures had central gradient removed in Astroart. Curves and Levels applied in Photoshop to optimize object features.  Luminance construction had background noise reduction applied (PixInsight SGBNR). Selective sharpening was  performed on the spiral arms. Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB).  G2V color calibration   factors were applied to the color channels for color correction.  Final Color balancing (to my eye) and final touches were done in Photoshop.   Final Image size is approximately 1380x1030.

 North is up in this image. NGC 3184  is a dim spiral galaxy located in the constellation of Ursa Major. There are star forming regions in this galaxy usually indicated by pinkish blotches. However, the color data in this image was of insufficient signal to pick them up readily. The reddish glow in the upper right comes from a  deep red M2III class star (SAO43270) just outside the image frame. The distance of NGC 3184 to Earth is approximately 40  million light years.   Horizontal FOV is about 20'

Image Center approximately - Equatorial 2000: RA: 10h 18m 17s Dec: +4125'24"


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