Unlike most of the planets, which follow almost exactly circular orbits around the Sun which only vary in their distance from the Sun by a few percent, Mars has a significantly elliptical orbit. Its distance from the Sun varies between 1.38 AU and 1.67 AU – a variation of over 20% – meaning that it receives 31% less heat and light from the Sun at aphelion as compared to perihelion.
Mars's distance from the Sun doesn't affect its appearance. From Fairfield, at the moment of aphelion it will not be readily observable since it will be very close to the Sun, at a separation of only 2° from it.
The position of Mars at the moment it passes aphelion will be:
|Object||Right Ascension||Declination||Constellation||Magnitude||Angular Size|
The coordinates above are given in J2000.0.
|The sky on 25 August 2019|
24 days old
All times shown in EDT.
Never attempt to point a pair of binoculars or a telescope at an object close to the Sun. Doing so may result in immediate and permanent blindness.
The circumstances of this event were computed using the DE430 planetary ephemeris published by the Jet Propulsion Laboratory (JPL).
This event was automatically generated by searching the ephemeris for planetary alignments which are of interest to amateur astronomers, and the text above was generated based on an estimate of your location.
|31 Jul 2018||– Mars at perigee|
|23 Aug 2020||– Mars 2020: a great chance to see the red planet|
|06 Oct 2020||– Mars at perigee|
|13 Oct 2020||– Mars at opposition|
© NASA/Hubble Space Telescope