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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
(single exp of 10 min)
EOS 5D with Baader filter
(PV, Italian Apennines) at 1350 m height
|18 May 2012
||10Micron GM1000 HPS
||No tracking! No guide-scope was even mounted. Perfect tracking over all the 25 exposures of 10 min each.
||T= +3°C, RH=80%
|Sky brightness at
zenith (with SQM-L)
||Transiting veils. First test of GM1000 mount, without guiding. Tracking was good enough for 10 min exposures.