LBN 468 in Cepheus 

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LBN 468 is a large and very faint nebula in Cepheus, not very far from the well known NGC 7023, the Iris nebula (2° toward East). Inside this nebula some dark nebulae are present such as LDN 1146 and 1147 (below), LDN 1153 and 1156 (left), LDN 1155 (top middle), and LDN 1150 (top right). A very small yellow nebula inside the latter is GN20.35.9. A similar nebula is GN20.45.4 positioned inside LDN 1156, on the left.
This nebula is so faint that, when I was collecting the data, I couldn't see it on 10 min subs. Nevertheless I'm quite satisfied of the overall result because the object nicely fits the field of view of 122'x82'. 

Technical Data
Optics TEC 140
Focal Length
1011 mm
Focal Ratio f/7.2
Exposure Time 4 h (single exp of 10 min)
CCD Canon EOS 5D with Baader filter
Sensitivity 800 ISO
Location Pian dell'Armà (PV, Italian Apennines) at 1350 m height
18 May 2012
Mount 10Micron GM1000 HPS
Tracking No tracking! No guide-scope was even mounted. Perfect tracking over all the 25 exposures of 10 min each.
Temperature and humidity T= +3°C, RH=80%
Sky brightness at zenith (with SQM-L) 21.2-21.4 mag/arcsec^2
Notes Transiting veils. First test of GM1000 mount, without guiding. Tracking was good enough for 10 min exposures.

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