If earth were further out [and more circular] to
Aphelion distance it be 1.321 kW / m ².
NEAs are subdivided into the Aten, Apollo, and Amor groups (that are categorized by their perihelion distance (q),
aphelion distance (Q), and their semi-major axes (a) of orbit) and the Potentially Hazardous Asteriods (PHAs).
The large 20 - AU difference between Pluto's perihelion and
aphelion distance results in interesting chemistry on Pluto's surface and in its atmosphere.
In science we calculate: The eccentricity of Jupiter's orbit is about 5 %, that means that the difference between perihelion and
aphelion distances is twice that, namely 10 %.
It shows a small fluctuation in the perihelion /
aphelion distances of about 15000 kilometers that are caused by planetary perturbations on a regular cycle.
Your evaluation was: Perihelion -
aphelion distances only show small fluctuations of 15,000 km on a regular cycle.
In April 2009 I produced a graph that nearly mirrors Nicola's graph A but is based on the Jupiter perihelion /
aphelion distances.
The modulation in Jupiter's perihelion /
aphelion distances is mainly brought about in my opinion by the gravitational perturbations induced by Saturn, a link to my original research can be found HERE.
Not exact matches
Instead, Planet X is likely to spend most of its time near
aphelion, slowly trotting along at
distances between 600 and 1200 AU.
He also figured out the planet goes faster when it's at perihelion, nearer the sun, than when it's at
aphelion, its furthest
distance.
Ca seasonal variation follows the behaviour expected from impact vaporization by interplanetary dust, due to Mercury's substantial radial excursions (heliocentric
distances between 0.306 AU at perihelion and 0.465 AU at
aphelion).
This is a consequence of Kepler's Law for elliptical orbits whereby Earth travels more slowly during
aphelion and hence has longer to accumulate the heat that has been reduced by the greater
distance.
Earth's orbit around the Sun is an ellipse, with a perihelion (closest approach) of 147.5 million km (91.7 million miles) in early January and an
aphelion (farthest
distance) of 152.6 million km (94.8 million miles) in early July.