M24 star cloud

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One of the brightest spot of the Milky Way is this star cloud encircling the M24 open cluster (left). Two pich black spots are near the top, B93 (left) and B92 (right). B92 is very interesting because in the darkest part only a single star is present.

Technical Data
Optics TEC 140
Focal Length
1011 mm
Focal Ratio f/7.2
Exposure Time 1h20m (single exp of 10 min)
CCD Canon EOS 5D with Baader filter
Sensitivity 800 ISO
Location Colle dell'Agnello (CN, Italian Alps) at 2700 m height
22 August 2012
Mount Gemini G-41
Tracking Lodestar on an 80mm f/5 refractor
Temperature and humidity T= +13°C, RH=54%
Sky brightness at zenith (with SQM-L) 21.3 mag/arcsec^2
Notes .

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