Astrophysics (index)about

J2000.0 equinox

(equinox as of the J2000.0 epoch used as a positional reference)

J2000.0 equinox is a standard equinox used as a reference in astronomy, being the position of the equinox as of epoch J2000.0. It is used as a reference for right ascension and declination coordinates.

Like the standard epoch, previous standard equinoxes have been used, generally near in time to the reports/catalogs. For example, prior to J2000.0 equinox, the B1950.0 equinox (analogously based on epoch B1950.0) was used.


(astronomy,designation)
http://en.wikipedia.org/wiki/Equinox_(celestial_coordinates)

Referenced by:
equinox
J designator

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