- astronomical equatorial coordinates
- 天球赤道: celestial equator; equinocti ...
- 赤道坐标系: equatorial coordinate system; equatorial system; equinoctial coordinate system
- 赤道坐标系统: equatorial system of coordinates; equinoctial coordinate system
- 地心赤道坐标系: geocentric-equatorial system
- 第一赤道坐标系: dependent equatorial coordinate system
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