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planet, the same side always faces its parent star, and its synodic day is infinite. Its sidereal day, however, is equal to its orbital period.
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of the Earth. The longest and shortest synodic days' durations differ by about 51 seconds. The mean length, however, is 24 hours (with
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215:. Each synodic day, this gradual motion is a little less than 1° eastward (360° per 365.25 days), in a manner known as
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38:"Solar day" redirects here. For the measurement of a solar day, see
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rotational period (sidereal day) and even its orbital period.
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David W. Hughes; B.D. Yallop; C.Y. Hohenkerk (15 June 1989).
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Time in Powers of Ten: Natural
Phenomena and Their Timescales
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Astronomy
Education at the University of Nebraska-Lincoln
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404:Gerard, T. Hooft; Stefan, Vandoren (12 May 2014).
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268:or synodic rotation period) is the same as its
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327:Mercury (planet) § Spin-orbit resonance
117:'s synodic day is the time it takes for the
272:with Earth and the Sun (the period of the
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156:of Earth's orbit around the Sun and the
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438:. The University of Nebraska-Lincoln
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599:"How long is a day on Venus?"
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31:Not to be confused with
603:TE AWAMUTU SPACE CENTRE
582:"SATELLITES AND ORBITS"
385:Day length fluctuations
168:), and is the basis of
52:synodic rotation period
459:"The Equation of Time"
345:Noon § Solar noon
228:Sun-synchronous orbits
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121:to pass over the same
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325:Further information:
292:Further information:
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410:. World Scientific.
264:'s synodic day (the
209:spherical background
479:1989MNRAS.238.1529H
278:synodic lunar month
139:Southern Hemisphere
131:Northern Hemisphere
538:"Equation Of Time"
192:near the equator.
180:solar time is the
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473:: 1529–35.
213:fixed stars
135:declination
125:(a line of
48:synodic day
717:Categories
632:2021-06-03
608:2021-06-03
391:References
370:Solar time
300:retrograde
224:spacecraft
170:solar time
158:axial tilt
106:Solar time
76:solar time
40:Solar time
728:Astronomy
659:Astronomy
497:0035-8711
266:lunar day
252:Lunar day
190:solstices
127:longitude
58:) is the
56:solar day
18:Solar day
339:See also
315:sidereal
246:The Moon
226:orbits,
222:Certain
205:ecliptic
197:coplanar
186:analemma
178:apparent
123:meridian
72:orbiting
645:Portals
475:Bibcode
333:Mercury
331:Due to
321:Mercury
256:Due to
230:, have
207:, on a
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276:, the
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70:it is
62:for a
60:period
671:Stars
623:"ESO"
585:(PDF)
469:(4).
307:Venus
288:Venus
199:with
115:Earth
96:Earth
568:NASA
550:2020
518:ISBN
493:ISSN
444:2020
412:ISBN
262:Moon
176:and
174:mean
68:star
50:(or
627:ESO
483:doi
467:238
305:of
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119:Sun
110:Day
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