Greenwich sidereal date — An Etymological Dictionary of Astronomy and Astrophysics

Greenwich sidereal date

روز ِ اختری ِ گرینویچ

ruz-e axtari-ye Greenwich

Fr.: jour sidéeal de Greenwich

The number and fraction of → mean sidereal days elapsed on the → Greenwich meridian since 12h January 1, 4773 BC (mean sidereal).

See also: → Greenwich meridian; → sidereal; → date.

An Etymological Dictionary of Astronomy and Astrophysics