Definition:Sidereal Day/Apparent

Definition

The apparent sidereal day is defined as the time interval between two successive meridian transits of the vernal equinox.

The duration of any given apparent sidereal day is not constant because of various astronomical effects.

Also see

• Definition:Mean Sidereal Day

• Definition:Day

Sources

• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): day
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): day