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Conjunction of Mars and Neptune

Dominic Ford, Editor
From the Conjunctions feed

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The sky at

Mars and Neptune will share the same right ascension, with Mars passing 1°44' to the south of Neptune.

From Fairfield, the pair will be visible in the dawn sky, rising at 01:10 (EDT) and reaching an altitude of 35° above the south-eastern horizon before fading from view as dawn breaks around 04:48.

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Mars will be at mag -0.2, and Neptune at mag 7.9, both in the constellation Aquarius.

The pair will be too widely separated to fit within the field of view of a telescope, but will be visible through a pair of binoculars.

A graph of the angular separation between Mars and Neptune 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 23h27m10s -06°25' Aquarius -0.2 10"0
Neptune 23h27m10s -04°41' Aquarius 7.9 2"2

The coordinates above are given in J2000.0. The pair will be at an angular separation of 91° from the Sun, which is in Taurus at this time of year.

The sky on 12 June 2020
Twilight ends
Twilight begins

21-day old moon
Waning Gibbous


21 days old

Rise Culm. Set
Mercury 06:56 14:26 21:55
Venus 04:37 11:55 19:13
Moon 01:11 06:32 11:53
Mars 01:16 06:56 12:36
Jupiter 22:32 03:20 08:04
Saturn 22:49 03:42 08:31
All times shown in EDT.


The circumstances of this event were computed using the DE405 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

08 Mar 2020  –  Neptune at solar conjunction
11 Sep 2020  –  Neptune at opposition
10 Mar 2021  –  Neptune at solar conjunction
14 Sep 2021  –  Neptune at opposition

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