perihelia perihelion的复数
perihelion motion[天] 近日点移动
perihelion passage近日点通过
Perihelion dist近日点距离
perihelion advance近日点进动
perihelion distance[天] 近日距;近日点距离
perihelion precession近日点进动
orbital perihelion轨道近日距
argument of perihelion[天] 近日点幅角;[天] 近日点角距;近日点辐角
N（名词） the point in its orbit when a planet or comet is nearest the sun 近日点 → compare aphelion