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“Alkor” Lacerta N25010c Newtonian, f/D = 4 SX Trius 694, Baader LRGB filter
ASA DDM 60 pro
L 27x10min / RGB 24x10min per filter
16 h 30 min
data acquired remotely using CCD Commander
vdB 9 in Cassiopeia
Reflection nebula
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Cassiopeia
several nights August - December 2017
1 400 ly for the illuminating star SU Cassiopeiae