Lorenzo Comolli's Astronomy HomePage

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LDN1622 is a dark nebula in Orion at only 2.7° NE of Messier 78, and on the edge of Barnard Loop (see the red in the bottom-right corner). This dark nebula stands in front of a large nebula emitting mainly red (H-alpha) light. The nebula resemble a big man, with the head at right and the legs at left. The prolongation of the legs shows more dark nebulae (top part) and both degrade into a bright nebula with a pink-blue color.
In the same fields more nebulae are cataloged, such as VdB 62 and 63, and many other LDN: 1616, 1618, 1615.

Technical Data
Optics	TEC 140
Focal Length	1011 mm
Focal Ratio	f/7.2
Exposure Time	5 h 30 min (single exp of 10 min), LRGB 150:50:50:80 min
CCD	SBIG STL-11000M
Location	Pian dell'Armà (PV, Italian Apennines) at 1350 m height
Date	11 January 2013
Mount	Gemini G-41
Tracking	Lodestar on an 80mm f/5 refractor
Temperature and humidity	T= (+1 to -3) °C, RH=45%
Sky brightness at zenith (with SQM-L)	21.0 mag/arcsec^2
Notes	North at top. First par of the night quite bright due to thin veils. This image is the first light of this ccd from the mountains.