Comet C/2009 P1 (Garradd)

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The Garradd comet has been clearly visible for many months, i.e. from Augusto 2011 to March 2012. In this image the comet is quite near the orange star Lambda Herculis.

Technical Data
Optics TEC 140
Focal Length
1011 mm
Focal Ratio f/7.2
Exposure Time 40m (single exp of 10 min)
CCD Canon EOS 5D with Baader filter
Sensitivity 800 ISO
Location Bogli (PC, Italian Apennines) at 1350 m height
29 December 2011, h 5 UT
Mount Gemini G-41
Tracking Lodestar on an 80mm f/5 refractor
Temperature and humidity T= -3°C, RH=86%
Sky brightness at zenith (with SQM-L) 21.5 mag/arcsec^2
Notes This is a crop of the full field.

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