[SQM] snow and the ground albedo
Glenn and Gail Muller
gmullers at primus.ca
Sun Jan 10 14:13:41 UTC 2010
January 11, 2010
Hey Everybody (Jan & Fabio, in particular),
Last night I managed to get the sought after SQM readings with snow cover. My backyard observatory is in town, though away from the brightly lit center. On a clear night, like last night with good (but not great) transparency, I usually get readings around 19.7 - 19.8. Last night, with snow cover everywhere except the main streets, my best reading was 19.13 - a difference for my location of about 0.6 . It was really cold, too, about -12C but the seeing was very steady - With my 12" reflector I easily picked out the E & F stars in Orion's Trapezium http://www.astropix.com/HTML/B_WINTER/TRAPEZ.HTM, and Rigels' companion was a piece of cake.
The GEM 'N I Dobservatory
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the sqm