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First Point Of Libra




Autumnal Equinox . It was named after the Constellation in which it occurred in ancient times - Libra . However due to Precession , the point gradually moves around the ecliptic. It is currently in the constellation Virgo since 700 BC. From the year AD 2450 it will be in Leo . The other such point, at the Vernal Equinox , is the First Point Of Aries .

In the Equatorial Coordinate System the First Point of Libra is defined to have a Right Ascension of 12h. The Declination is zero due to the position on the celestial equator.