1016 m)

' Allen's Astrophysical Quantities, 4th Ed., ed. A. N. Cox, AIP Press, 2000.

Table A7. Constants involving timea

Mean solar day

Sidereal day, relative to vernal equinox


Julian year (exact) Julian century (exact) Tropical year (equinox to equinox) Sidereal year (fixed star to fixed star) Anomalistic year

(perihelion to perihelion)

Julian date 1900 Jan. 0.5 2000 Jan. 0.5 2100 Jan. 0.5

Standard Julian epochs J1900.0

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