Table 1.

Source of the climatic precession and eccentricity periods, as derived from the fundamental frequencies and precession constant

Parameter	Source	Period (ky)—Today*
p1	k + g5	23.678
p2	k + g2	22.371
p3	k + g4	18.951
p4	k + g3	19.103
p5	k + g1	23.120
e1	g2 − g5	405.091
e2	g4 − g5	94.932
e3	g4 − g2	123.945
e4	g3 − g5	98.857
e5	g3 − g2	130.781

^*Precession and eccentricity estimates from ref. 2.