Thanks, Bill, for once again politely answering a dumb question. You probably won't believe that for our new house in Brattleboro, which has a wall facing 46.56 degrees east of south, I'm just completing a combination noon dial, featuring a local apparent noon vertical line as well as a full analemma for Eastern standard noon, plus appropriate curves for the solstices and a straight line for the equinoxes. (As a result of an earlier question, the indicating spot of sunlight will pass through a circular hole installed parallel to the dial plate. :-) )
A couple more "senior moments" and I'll go out and purchase stock in a long-term care facility!
Best wishes, Mac
In a message dated 1/1/01 9:02:52 PM Eastern Standard Time, [EMAIL PROTECTED] writes: > If my plane goes down in the south Pacific, I float around for > some time in a raft, and then live for a couple of years in a cave > which boasts a thin beam of sunlight, how, even with a working watch, > would I draw an accurate analemma? > You would mark the position of the sunbeam at the same watch time each day, and if the watch remains accurate, in a year you would have a full analemma. This is how the famous cover photograph from Sky and Telescope was made (about 20 years ago?). Bill G.
