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Conjunction of Mars and Uranus

Dominic Ford, Editor
From the Conjunctions feed

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The sky at

Mars and Uranus will share the same right ascension, with Mars passing 0°37' to the north of Uranus.

At around the same time, the two objects will also make a close approach, technically called an appulse.

From Cambridge, the pair will become visible around 18:12 (EDT) as the dusk sky fades, 31° above your western horizon. They will then sink towards the horizon, setting 3 hours and 40 minutes after the Sun at 21:08.

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Mars will be at mag 1.3, and Uranus at mag 5.9, both in the constellation Pisces.

The pair will be a little too widely separated to fit comfortably 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 Uranus 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 01h21m20s +08°34' Pisces 1.3 4"6
Uranus 01h21m20s +07°57' Pisces 5.9 3"4

The coordinates above are given in J2000.0. The pair will be at an angular separation of 43° from the Sun, which is in Aquarius at this time of year.

The sky on 27 February 2017
Twilight ends
Twilight begins

1-day old moon
Waxing Crescent


1 day old

Rise Culm. Set
Mercury 06:20 11:37 16:53
Venus 07:08 13:50 20:33
Moon 07:07 12:52 18:38
Mars 08:01 14:36 21:12
Jupiter 20:59 02:40 08:17
Saturn 02:23 07:00 11:36
All times shown in EST.


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

15 Oct 2016  –  Uranus at opposition
14 Apr 2017  –  Uranus at solar conjunction
19 Oct 2017  –  Uranus at opposition
18 Apr 2018  –  Uranus at solar conjunction

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