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降交点 (koukouten) Japanese meaning: descending node | Kotomora

降こう交こう点てん

こ

う

こ

う

て

ん

Meanings

1

descending node

Astronomy term: the point where an orbit crosses a reference plane from north to south.

月つきの降こう交こう点てんは約やく18.6年ねん周しゅう期きで移

い

動どう

する

。

The Moon's descending node moves with a period of about 18.6 years.

Kanji

降descend, precipitate, fall
交mingle, mixing, association
点spot, point, mark

Related words

昇しょう交こう点てん
昇交点 is the ascending node, where the orbit crosses from south to north, the opposite of 降交点.

Etymology

Compound of 降 (descending) + 交 (intersection) + 点 (point), a straightforward technical term.