The Analemma

Analemma: A graduated scale shaped like a figure 8 and showing the sun's declination and the equation of time for each day of the year usually constituting part of a sundial.

The shape of the Analemma here on Earth is a result of our elliptical orbit and offset axis of rotation. The shortest day of the year is on the Winter Solstice (Dec. 21) but the earliest sunset is around Dec. 8, and the latest sunrise is around Jan 3.

A short version of the explanation for the analemma can be found here.

An entire web site dedicated to this subject is here.

You can check sunrise/sunset times here (select Princeton).

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Last modified 11/24/2003