sidereal year

The actual astronomical value stated for the sidereal year however, is not as accurate.

A further characteristic is that its mean orbital period about the Sun is exactly one sidereal year.

Its mean orbital period is one sidereal year.

It approximates both the sidereal year and the tropical year to about 0.008 days.

Since this discovery a distinction has been made between the tropical year and the sidereal year.

Therefore the anomalistic year is slightly longer than the sidereal year, by about five minutes.

A sidereal year is the time taken by the Earth to orbit the Sun once with respect to the fixed stars.

As on Earth, the sidereal year is not the quantity that is needed for calendar purposes.

The difference between the sidereal year and tropical years is identical to Precession (astronomy).

Such a calendar effectively uses the sidereal year.

Years are synchronized with the solar sidereal year by adding a month every three years.

Coyote's calendar is based on the sidereal year of its primary, Bear, a slightly elliptical orbit 1,096 days long.

This remained the most accurate estimate for the length of the sidereal year anywhere in the world for over a thousand years.

The mean calendar year of such a calendar approximates the sidereal year.

Comparing this with the length of the sidereal year, he calculated that the rate of precession was not less than 1 in a century.

Because of the Earth's axial precession, this year is about 20 minutes shorter than the sidereal year.

It is slightly shorter than the sidereal year due to the precession of Mars' rotational axis.

Time in a fairy fort moves at a rapid rate, and a sidereal year was eight years in the life of Dhrun.

It follows that the Earth's orbital period, the length of a sidereal year, also remains unchanged as the orbit evolves.

It is presently less than the sidereal year and its duration is very close to the mean Julian year of 365.25 days.

In that time, the number of full moon cycles passed becomes one less than the number of sidereal years passed.

This is the "sidereal year."

But the solar month varies by the type of year such as tropical year, sidereal year, etc.)

It was almost a sidereal year after I had brought Giyan back to Axis Tyr.

"Because its rotational period precisely matches its sidereal year, this planet presents the same face to its sun at all times.