Rosette nebula, NGC 2244

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Technical Data
Optics Pentax 75
Focal Lenght 500mm
Focal Ratio f/6.7
Exposure Time 3h20min (20x10 min)
CCD Canon EOS 5D with baader filter
Location Cosola (PC, Italian Appennines) at 1150 m height
21 February 2009
Mount Gemini G-41
Tracking ST4 on a 80mm f/5 refractor
Temperature and humidity T=-3 °C, RH=50%
Sky brightness at zenith (with SQM-L) 21.2 mag/arcsec^2
Notes -

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