B228, the Dark Wolf nebula

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In Lupus the Milky Way is very rich in stars, and so any gas clouds is apparent in front of this bright background. This dark nebula in Lupus is named the Dark Wolf, in the middle between Chi and Psi Lupi.
Technical data
Optics Sigma 180 mm f/3.5
Focal Length 180 mm
Focal Ratio f/4
Exposure Time 1h30m (single exp of 10 min)
CCD Canon EOS 5D with Baader filter
Sensitivity 800 ISO
Location Tivoli Farm (Namibia) at 1350 m height
Date
 29 August 2011
Mount Losmandy G11
Tracking none
Temperature and humidity T= +15°C, RH=35%
Sky brightness at zenith (with SQM-L) 21.75 mag/arcsec^2 (MW at zenith)
Notes This image is a collaborative effort of the Namibia 2011 expedition. Processing: Lorenzo Comolli. Images by: Lorenzo Comolli, Luigi Fontana, Giosuè Ghioldi, Emmanuele Sordini. Thanks to Alessandro Gambaro for loaning us the lens.

HTML Editing and Publishing by Lorenzo Comolli. Email me at comolli@libero.it.
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