0 the point in an object's orbit (= a curved path in space around a planet or star) around the sun at which the object is furthest from the sun: --
On a very long time scale, the dates of the perihelion and of the aphelion progress through the seasons, and they make one complete cycle in 22,000 to 26,000 years.
The hemisphere that is in summer at perihelion receives much of the corresponding increase in solar radiation, but that same hemisphere in winter at aphelion has a colder winter.
Given the extreme orbital eccentricity of this object, different epochs can generate quite different heliocentric unperturbed two-body best-fit solutions to the aphelion distance (maximum distance) of this object.
Given the orbital eccentricity of this object, different epochs can generate quite different heliocentric unperturbed two-body best-fit solutions to the aphelion distance (maximum distance) of this object.
Dust storms are most common during perihelion, when the planet receives 40 percent more sunlight than during aphelion.
During aphelion water ice clouds form in the atmosphere, interacting with the dust particles and affecting the temperature of the planet.
It is the opposite of aphelion, which is when the orbit of the object is farthest from the sun.
When the orbit is at its most elliptical, the amount of solar radiation at perihelion will be about 23% more than at aphelion.
