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 line 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.

Further reading:

Referenced by pages:
J designator