Last Updated：2025/12/04

(astronomy) The great circle through an object whose location is to be determined and the two celestial poles.

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hour circle

Source Word

hour circle

Noun

(astronomy) The great circle through an object whose location is to be determined and the two celestial poles.

Japanese Meaning

天文学において、位置を決定する天体と天の二極（天の北極と南極）を結ぶ大円。

To locate the star precisely, the astronomer measured its hour circle with a transit instrument.

星の位置を正確に特定するために、天文学者は子午線望遠鏡を使って、その天体と天の二極を通る大円を測定した。

Sense（1）

(astronomy) The great circle through an object whose location is to be determined and the two celestial poles.

hour circles

（ plural ）