On Fri, 4 Feb 2011, Mark Calabretta wrote: > On Thu 2011/02/03 11:05:01 -0000, Tony Finch wrote > in a message to: Leap Second Discussion List <leapsecs@leapsecond.com> > > >In order to see the analemma you need to know the equation of time. > > You only need a clock and knowledge of the length of a mean solar > day. The analemma itself shows you the equation of time (and the > obliquity of the ecliptic).
If you have a good clock you can work out the equation of time. If your reference is a sundial you can set a bad clock to mean solar time using the equation of time. Tony. -- f.anthony.n.finch <d...@dotat.at> http://dotat.at/ HUMBER THAMES DOVER WIGHT PORTLAND: NORTH BACKING WEST OR NORTHWEST, 5 TO 7, DECREASING 4 OR 5, OCCASIONALLY 6 LATER IN HUMBER AND THAMES. MODERATE OR ROUGH. RAIN THEN FAIR. GOOD. _______________________________________________ LEAPSECS mailing list LEAPSECS@leapsecond.com http://six.pairlist.net/mailman/listinfo/leapsecs
