27 November 2007

The Bottom of the Analemma

In June I posted on the analemma: "In the Northern Hemisphere from about the last week of May until mid-July, or for almost seven weeks, the apparent noon sun position rises and then falls just 3.5 degrees as it cruises the top of a figure "8" known to sun watchers as an analemma curve, or a trace of the sun's noon perpendicularity to the earth over 12 months as it moves between the globe's tropical "small circles." For about two months, the amount of daylight will change little for most of the northern hemisphere's population, which makes the most of its seasonal bounty."
Here at the end of November, the noon sun position has raced south almost 47 degrees, setting up the reciprocal of our summer post; from now until early February, for about 8 weeks the winter sun will cruise the bottom 3.5 degrees of that figure "8" with little noticeable change in daylight hours for us, who will be pausing by warm radiators, sleeping under favorite feather covers, and sipping warm and spirited beverages. Today the sun set behind The Dome at 1556 hours, and will rise above Beartown Mountain a bit after 0700 hours, from now until early February.

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