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shot on November 19, 2004 from my backyard in Castro Valley, Ca.
Compact Collapsible Cassegrain 18" @f/12.60 (F=5760mm)
IMG6303E camera @-35C
AO7 @ 16 Hz
RCOS Dichroic beam splitter
ST7E guide camera
FLI CFW1 Filter wheel
Optec TCF-S focuser
Schuler Ha filter
11 exposures of 20 minutes through Schuler Halpha filter (binned 2x2, scale=0.64 arc-sec/pixel)
three hours 40 minutes total exposure