IC 2169 and 446

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Monoceros is a constellation rich in interesting nebula such as the Rosette and Cone nebula. Only 2° west of Cone lies this interesting field with the most prominent nebula catalogued as IC 2169. Inside this large blie nebula lies some other catalogue numbers such as VdB76, 77 and 78. A little bit North (here at right) lies IC 446, connected to the first with a dark nebula lane. VdB 79 is nearby. Two other blue nebula are on the East side (here above), catalogued as NGC 2245 and 2247. All the field is rich with dark nebulas. Only a little and faint part of the Cone nebula is visible here on the top-left border. Definitely a really rich and interesting region!

Technical Data
Optics TEC 140
Focal Length
1011 mm
Focal Ratio f/7.2
Exposure Time 2 h 40 min (single exp of 10 min)
CCD Canon EOS 5D with Baader filter
Sensitivity 800 ISO
Location Bogli (PC, Italian Appenines) at 1350 m height
8 December 2012
Mount Gemini G-41
Tracking Lodestar on an 80mm f/5 refractor
Temperature and humidity T= (-5 to -10) °C, RH=40%
Sky brightness at zenith (with SQM-L) 21.1 mag/arcsec^2
Notes North at left. Not truly dark sky, maybe due to airglow and light pollution

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