vdB 20, 21, 22, 23 (Pleiades)

Observing Site Jeffers Petroglyphs
Date and time 9/18/09 (2147-2255)
Lynds scale 2 (est)
Sky Darkness 3
Sky Transparency fair
Moon Magnitude not in sky
Imaging Telescope TV 102 @ f/7
Imaging Camera XTi
Acquisition 20x180s
Calibration dark 20