黄こう経けい

also: おうけい

こ

う

け

い

Meanings

1

noun

ecliptic longitude; celestial longitude

astronomy

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

おうけい

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.

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.