The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.

Conjunction of Mars and Eris

Dominic Ford, Editor
From the Conjunctions feed

Please wait
Loading 0/4
Click and drag to rotate
Mouse wheel to zoom in/out
Touch with mouse to dismiss
The sky at

Mars and 136199 Eris will share the same right ascension, with Mars passing 7°58' to the north of 136199 Eris.

From Fairfield, the pair will be visible in the morning sky, becoming accessible around 22:48, when they reach an altitude of 7° above your eastern horizon. They will then reach their highest point in the sky at 04:01, 47° above your southern horizon. They will be lost to dawn twilight around 06:01, 39° above your south-western horizon.

Begin typing the name of a town near to you, and then select the town from the list of options which appear below.

Mars will be at mag -1.8 in the constellation Pisces, and 136199 Eris at mag 18.8 in the neighbouring constellation of Cetus.

A graph of the angular separation between Mars and 136199 Eris around the time of closest approach is available here.

The positions of the two objects at the moment of conjunction will be as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
Mars 01h47m30s +06°32' Pisces -1.8 18"9
136199 Eris 01h47m30s -01°26' Cetus 18.8 0"0

The coordinates above are given in J2000.0. The pair will be at an angular separation of 131° from the Sun, which is in Leo at this time of year.

The sky on 31 August 2020
Twilight ends
Twilight begins

12-day old moon
Waxing Gibbous


12 days old

Rise Culm. Set
Mercury 07:17 13:37 19:57
Venus 02:35 09:50 17:06
Moon 19:08 --:-- 04:22
Mars 21:38 04:04 10:30
Jupiter 16:51 21:29 02:07
Saturn 17:20 22:04 02:48
All times shown in EDT.


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.

Related news

13 Apr 2020  –  136199 Eris at solar conjunction
17 Oct 2020  –  136199 Eris at opposition
13 Apr 2021  –  136199 Eris at solar conjunction
17 Oct 2021  –  136199 Eris at opposition

Image credit

The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.






Color scheme