NGC 6820, LDN 792, Sh2 87-88

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This is a very rich field in the Milky Way in Vulpecula. The main object is NGC 6820, the red nebula on the left, with an interesting dust lane. On the right the huge dark nebula is LDN 792, and the two red nebulas at the top are Sh2 87 and 88. North at right.

Technical Data
Optics Pentax 75 apo refractor
Focal Lenght 500 mm
Focal Ratio f/6.7
Exposure Time 1h50m (single exp of 10 min)
CCD Canon EOS 5D with baader filter
Sensitivity 800 ISO
Location Colle del Nivolet (AO, Italian Alps) at 2530 m height
3 July 2011
Mount Gemini G-41
Tracking Lodestar at 100 mm focal lenght
Temperature and humidity T= +1°C, RH=70%
Sky brightness at zenith (with SQM-L) 21.5 mag/arcsec^2
Notes Very good sky, transparent and clear. North at right.

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