celestial ephemeris pole concept from the Astronomy knowledge base

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celestial ephemeris pole

subject fact

celestial ephemeris pole has definition The reference pole for nutation and polar motion; the axis of figure for the mean surface of a model Earth in which the free motion has zero amplitude. This pole has no nearly diurnal nutation with respect to a space-fixed or Earth-fixed coordinate system. has source: Seidelman, P. 1992 Explanatory Supplement to the Astronomical Almanac, University Science Books, Mill Valley, CA, 2001-09-27 09:32:39.0
is an instance of equatorial coordinate

equatorial coordinate has declination 2001-09-27 09:32:38.0
has right ascension
has component equatorial coordinate component

point has dimensions 0

celestial ephemeris pole	has definition The reference pole for nutation and polar motion; the axis of figure for the mean surface of a model Earth in which the free motion has zero amplitude. This pole has no nearly diurnal nutation with respect to a space-fixed or Earth-fixed coordinate system.
celestial ephemeris pole	is an instance of equatorial coordinate
equatorial coordinate	has declination
	has right ascension
	has component equatorial coordinate component
point	has dimensions 0