Difference between revisions of "General Precession"
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General Precession
</dt>
The resultant motion of the components causing precession
of the equinoxes. The general precession is westward along the ecliptic at
the rate of about 50.3 seconds of arc per year.
</dd>
The effect of the sun and moon, called lunisolar precession, is to
produce a westward motion of the equinoxes along the ecliptic. The effect of
other planets, called planetary precession, tends to produce a much smaller
motion eastward along the ecliptic. The component of general precession along
the celestial equator, called precession in right ascension, is about 46.1
seconds of arc per year; and the component along a celestial meridian, called
precession in declination, is about 20.0 seconds of arc per year. See astronomical
constants. [[/a>|/a>
]]
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use
