| 单词 | argument of perigee | 
| 释义 | argument of perigee [`är·gyǝ·mǝnt ǝv `per·ǝ·jē]  ASTRONOMY The angle or arc, as seen from a focus of an elliptical orbit, from the ascending node to the closest approach of the orbiting body to the focus; the angle is measured in the orbital plane in the direction of motion of the orbiting body. Also known as argument of perihelion.  | 
	
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