Longperiod variations
Variations for a very long period (1,000,000 BC to 1,000,000 AD)
According
to Meeus
(More Mathematical Astronomy Morsels, Chapter 33) Simon et
al. published in 1994 an expression for the eccentricity
e:
where
T is measured in thousands of Julian years from 2000:
The
time span of validity is from 4000 BC to 8000 AD.
0.0000000002*T^{4}+0.0000000003*T^{5}
Compute the eccentricity by JavaScript:
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Variations for a very long period (1,000,000 BC to 1,000,000 AD)

(c) 2006 J. Giesen
2006, Mar 21