M109 Luminance only

click image to enlarge

Taken on February 28, 2005 from my backyard in Castro Valley, Ca.

Compact Collapsible Cassegrain 18" @f/12.60 (F=5760mm), image scale = 0.24 arc-sec/pixel

ST10XME camera @-30C

AO7 @ 1.5Hz

FLI CFW1 Filter wheel

Optec  IR-Blocked Lum filter

3 exposures of 20 minutes (binned 1x1)

one hour total exposure time

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