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伴星 (ばんせい) Japanese meaning | Kotomora

伴ばん星せい

ば

ん

せ

い

Meanings

1

noun

companion star

astronomy

Astronomical term for a star that is gravitationally bound to and orbits another star in a binary or multiple star system.

シリウスには伴ばん星せいが存そん在ざいすることが知しられている。
It is known that Sirius has a companion star.

Kanji

伴consort, accompany, bring with
星star, spot, dot

Similar words

連れん星せい
連星 refers to a binary star system as a whole, while 伴星 specifically denotes the fainter companion star within such a system.

Etymology

Compound of 伴 (ban, 'companion') and 星 (sei, 'star'). The kanji 伴 carries the meaning of accompanying or being together, reflecting the star's role as a companion to the primary star.