anomalistic year


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Related to anomalistic year: sidereal year, tropical year

anomalistic year

anomalistic year (ənŏmˌəlĭsˈtĭk), time required for the earth to go from the perihelion point once around the sun and back to the perihelion point. It is 365 days, 6 hr, 13 min, 53.0 sec of mean solar time (see solar time). The anomalistic year is longer than the sidereal year and the tropical year because of the eastward motion of the line of apsides (see apsis), which is caused by the slow rotation of the earth's orbit as a whole.
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anomalistic year

The time interval of 365.259 64 days between two successive passages of the Earth through the perihelion of its orbit. The anomalistic year is longer than the sidereal and tropical years because of the advance of the perihelion caused (mainly) by planetary perturbations.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

anomalistic year

[ə¦näm·ə¦lis·tik ′yēr]
(astronomy)
The period of one revolution of the earth about the sun from perihelion to perihelion; 365 days 6 hours 13 minutes 53.0 seconds in 1900 and increasing at the rate of 0.26 second per century.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.