7、Easy to spot in binoculars for now, McNaught will sink into the twilight along the eastern horizon in the coming days as it heads toward perihelion (closest approach to the sun) on July 2.
3、The angular deviation, as observed from the sun, of a planet from its perihelion.
8、The results show that the solar mass-loss extends the semi-major axis, the distance at perihelion and orbital periods of the meteor streams, especially, the extensive influence on the semi-major axis is not overlooked, but this influence on other orbital elements may be neglected.
5、When perigee and perihelion coincide tidal range is at its greatest.
4、The anomalistic year is the time between successive transits of the Earth through the perihelion.
6、(astronomy) position of a planet as defined by its angular distance from its perihelion (as observed from the sun).
2、W hen the Earth moves from perihelion to aphelion, its radiation belts are expansion, and aphelion to perihelion contraction.
1、precession of perihelion
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