IC 2169 in Monoceros
CLICK ON IMAGE FOR FULL SIZE VIEW (2600x1950)
Scope: ES MN152 152 mm Mak-Newt @ f/4.8, Blair Valley, Anza Borrego Desert, CA, 28 January 2011 Camera: ST8300M
Exposure: 8 x 10 min UV/IR Block exposure (1x1), 12 x 6 min UV/IR Block exposure (2x2), 8 x 5 min RGB exposures (2x2).
Processing: Images were captured with CCDSoft. Aligned/stacked and dark subtracted in Astroart ; Sigma Combine method was used for stacking subs. All channels were scaled and rough color balanced in Astroart. Central Gradient removal was done in Astroart. Channels were co-registered in Astroart. The 10 minute 1x1 bin UV/IR Block exposures and the 6 minute 2x2 bin UV/IR Block exposures were combined for the main luminance construction with level adjustments and curves to bring out object features. LRGB combine was done in Photoshop. Saturation adjustments were selectively applied excluding the brighter areas to avoid over brightening and out of Gamut. A light background noise reduction was applied in PixInsight LE (SGBNR). Selective sharpening was performed. Final touches and color balance in Photoshop. Final Image size is approximately 3352x2532 (cropped and resized to 2600x1950).
All exposures in this image were guided; North is to the right in this image. IC 2169 is the bright blue object dominating this field (also known as IC 447 and containing vdB 77, 78). The smaller object to the right of IC 2169 is IC 2167 (also known as IC 446). The two objects toward to top of the image are NGC 2245 (left) and NGC 2247 (right). The very small vdB 79 reflection nebula is just above and to the left of IC 2167. The reduced density of stars on the right side of the image is due to the interstellar material obscuring background stars. . The galactic cloud complex containing these objects has an estimated average distance to Earth of 2,480 light years. The Horizontal FOV is 88'.
Image center is located approximately - Equatorial 2000: RA: 06h 17m 46s Dec: +22°32'10"
All images and content remain the property of Jim Thommes - copyright 2003 - 2012
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