Sidereal year

In Astronomy, a sidereal year is a Unité of time corresponding to the duration necessary so that the Sun finds the same position compared to the fixed star S on the celestial Sphère, observed since the same place on the Ground. Alternatively, it is about the time interval so that the Earth carries out a complete revolution on its orbit in a fixed reference frame.

Value

For the time J2000.0, one year sidereal lasts on average: 365.256363051 D (that is to say 365 D 6 H 9 min 9 S) or: 365.25636042 average solar days. The sidereal year is 20 minutes and 24 seconds longer than the tropical year average.

Sidereal year

Value

See also