semi-minor axis (of an orbit)
Technical term used in orbital mechanics and astronomy. Refers to the shorter radius of an elliptical orbit.
The semi-minor axis represents half the length of the minor axis of an elliptical orbit.
Refers to the semi-major axis, the longer radius of an elliptical orbit.
Compound of 軌道 (orbit) + 短 (short) + 半径 (radius). A direct calque of the English term 'semi-minor axis'.