IC 1805 in Cassiopeia



Scope:  Vivitar 180mm SLR  f/3.5 Location: Blair Valley, Anza Borrego Desert, CA   29 October, 2005  Camera: Artemis285

Exposure: 8 x 300 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 rough color balanced in Astroart.  Channels were co-registered in Astroart.  The HA exposure was the main exposure for the luminance construction - Minimum filter was applied and faded. Curves and Levels were applied in Photoshop to optimize object appearance.  Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB).  Nebula (without stars) was extracted from the HA exposure  and partly subtracted from the green and blue channels un-intentionally  strengthened by the Luminance Layering.  Color balancing and final touches were done in Photoshop.  Selective layer sharpening was performed on prominent nebula features. Final Image size is approximately 1392x1040.

All exposures in this image were guided; North is up in this image. The larger IC 1805 region is commonly known as the "Heart Nebula" due to it's distinctive shape. The brighter area in the upper right is NGC 896 / IC 1795 region. This image replaces an earlier image that can be seen in the Archives here. The Horizontal FOV is 180'.

Image center is located approximately - Equatorial 2000: RA: 02h 34m 02s Dec: +6123'10"



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