equatorial telescope; equatorial mount
A telescope mount aligned with the celestial equator, used in astronomy to track stars. The term can refer to the mount itself or the telescope equipped with it.
A large equatorial telescope is installed at the observatory.
Using an equatorial mount, you can automatically track the movement of stars.
Compound of 赤道 (sekidō, 'equator') and 儀 (gi, 'instrument'), referring to an instrument aligned with the celestial equator.