sidereal day


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Related to sidereal day: synodic month

sidereal day

n.
The time required for a single rotation of the earth on its axis in reference to any star or to the vernal equinox at the meridian, equal to 23 hours, 56 minutes, 4.09 seconds in units of mean solar time.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

sidereal day

n
(Astronomy) See day5
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

side′real day′



n.
the interval between two successive passages of the vernal equinox over the meridian, being about four minutes shorter than a mean solar day.
[1785–95]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

sidereal day

A measure of time approximately equal to 23 hr, 56 min, 4.09 sec. A sidereal day represents the time needed for one complete rotation of the Earth on its axis.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sidereal day - the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
time unit, unit of time - a unit for measuring time periods
sidereal time - measured by the diurnal motion of stars
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
It is well known that the GPS satellite orbits were selected to have a period of half a sidereal day (23 hours 56 minutes 4 seconds) with a daily repeating ground track [23,24].
A geosynchronous orbit can, however, be elongated and inclined with respect to the Earth's equator and still have a period equal to a sidereal day, making the satellite appear to wander around a fixed point on the sky.
Heatrow beat Ample Note by three-length while Regalle was third and Sidereal Day fourth.
Two complete orbits total 23 h 56 min, a period known to astronomers as a sidereal day, the exact time the Earth takes to complete one rotation on its axis.
The synodic day is distinguished from the sidereal day, which is one complete rotation in relation to distant stars.
[[sigma]'.sub.C] = 6.32000 + 0.00237i, [[sigma]'.sub.f] =-0.0146011 +0.0001533, (in radians per sidereal day) are the complex Chandler and FCN frequencies in celestial frame, respectively, [[sigma].sub.C] = 0.01962 + 0.00237, is the complex Chandler frequency in terrestrial frame and [a.sub.p] = 9.509 x [10.sup.-2], [a.sub.w] = 5.489 x [10.sup.-4] are dimensionless constants.
Jockey Gerald Avranche steered the favourite, owned by Al Nasseriyeh and trained by Alan Smith, past Danish Express while Thaqib was third and Sidereal Day fourth.
When she isn't teaching physics, Pamela Gay blogs about our changing understanding of the cosmos one sidereal day at a time at www.starstryder.com.
an increase in d/dt([theta](t)) at sunrise, a decrease at sunset and a maximum deflection at noon) [1,2], having a period length of 1440.24 [+ or -] 2.60 min [2], indicating that it is related to solar and not sidereal time (length of sidereal day: 1436 min, solar day: 1440 min).