sidereal day concept from the Astronomy knowledge base

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sidereal day

subject fact

sidereal day has value 23^h56^m4^s.091 2001-09-27 09:32:53.0
has definition The length of time between two successive meridian transits of the vernal equinox (cf. mean solar day). Because of precession the sidereal day is about 0.0084 second shorter than the period of rotation of Earth relative to a fixed direction (23^h56^m4^s.099). has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:53.0
is an instance of day

day has symbol d 2001-09-27 09:32:54.0
has value in SI unit 24 h = 86400 s 2001-09-27 09:32:55.0

time unit is a unit of time 2001-09-27 09:32:52.0

unit has historical origin 2001-09-27 09:32:42.0
represents

sidereal day	has value 23^h56^m4^s.091
	has definition The length of time between two successive meridian transits of the vernal equinox (cf. mean solar day). Because of precession the sidereal day is about 0.0084 second shorter than the period of rotation of Earth relative to a fixed direction (23^h56^m4^s.099).
	is an instance of day
day	has symbol d
day	has value in SI unit 24 h = 86400 s
time unit	is a unit of time
unit	has historical origin
unit	represents