NGC 2174 and NGC 2175 in Orion
CLICK ON IMAGE FOR FULL SIZE VIEW (2400x1800)
Scope: ES MN152 152 mm Mak-Newt @ f/4.8, Blair Valley, Anza Borrego Desert, CA, 1 January 2011 Camera: ST8300M
Exposure: 9 x 10 min H-Alpha exposure (1x1), 5 x 6 min H-Alpha exposure (1x1), 5 x 4 min UV/IR Block exposure (2x2), 8 x 4 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 H-Alpha exposures, the 6 minute H-Alpha, and the 4 minute 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. Bright area exclusion on some portions of Levels, Curves, and Saturation was to avoid core 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 (resized to 2400x1800).
North is up in this image. There is a hard to visualize star cluster in the lower portion of the nebula known as NGC 2175 . NGC 2175 is about 850 light years distant from Earth. The surrounding emission nebula is cataloged as NGC 2174. The bluish area to the right of the nebula is an un-catalogued reflection component. These object are located in the constellation of Orion. This image replaces and earlier image that can be seen in the Archives here . The Horizontal FOV is 88'.
Image center is located approximately - Equatorial 2000: RA: 06h 09m 51s Dec: +20°27'50"
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