LBN 603 in Cassiopeia

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Despite the "bright" in the LBN name (LBN=Lynds Bright Nebula), this object is very faint. I hardly can see in the 10 min subs with CCD and luminance filter! The main and larger object is LBN 603, but many parts are catalogued with other names. The main dark nebula is TGU H809, composed of at least [GA90] 3-6, [WDM94] Cas B 2, GM 3-2, PLCKECC G122.18.10.27. The nearest dark nebula at right is [GA90] 3-4. Two other dark nebulas, while less prominent, are catalogued in the more famous LDN: they are LDN 1295 and LDN 1296. Some faint and small PGC galaxies are also present in the field.

Take a look here at the processing of Alessandro Falesiedi of this data, merged with his deep one. The result is really awesome.

Technical Data
Optics TEC 140
Focal Length
1011 mm
Focal Ratio f/7.2
Exposure Time 6 h 50 min (single exp of 10 min), LRGB 230:50:50:90 min
CCD SBIG STL-11000M @-30°C
Location Bogli (PC, Italian Apennines) at 1350 m height
31 October 2013
Mount Gemini G-41
Tracking Lodestar on an 80mm f/5 refractor
Temperature and humidity T= +5 °C, RH=100%
Sky brightness at zenith (with SQM-L) 20.9-21.2 mag/arcsec^2
Notes North at left.

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