# What is perihelion and aphelion of earth?

##### 1 Answer

Feb 13, 2016

#### Answer:

In the solar system, perihelion and and aphelion are the positions of a solar orbiter (planet or comet or asteroid) when the the distance from the Sun is least and greatest respectively.

#### Explanation:

Also, they are used to give least and greatest distances. As the orbits are elliptical, by symmetry, the time for moving from either to the other is (orbit period)/2. For the Earth, perihelion is 1.471 E+08 km and aphelion is 1..521 E+08 km, nearly. The Earth reaches these positions in the first week of Jan and Jul.