黄こう経けい

also: おうけい

こ

う

け

い

Meanings

1

ecliptic longitude; celestial longitude

Astronomical term; the angular distance along the ecliptic from the vernal equinox.

天てん体たいの黄こう経けいを計けい算さんする。
Calculate the ecliptic longitude of a celestial body.

Kanji

黄yellow
経sutra, longitude, pass thru

Related words

黄こう緯い
黄緯 is ecliptic latitude, the angular distance north or south of the ecliptic, while 黄経 is the longitude along the ecliptic.
赤せっ経けい
赤経 is right ascension in the equatorial coordinate system, whereas 黄経 is measured along the ecliptic.

Word family

昇しょう交こう点てん黄こう経けい
longitude of the ascending node

Written forms

黄経Usage100%
- こうけい
  Standard kanji form; reading こうけい is the most common.
- おうけい
  Alternate reading; less common than こうけい.
おうけい

Etymology

Compound of 黄 (yellow, referring to the ecliptic) and 経 (longitude). The reading こうけい is the standard on'yomi; おうけい is a less common variant.