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

Conjunction of Mercury and Mars

Sat, 16 Sep 2017 at14:25 EDT(9 days ago)
18:25 UTC

Dominic Ford, Editor
From the Conjunctions feed

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The sky at

Mercury and Mars will share the same right ascension, with Mercury passing 0°03' to the north of Mars.

From Ashburn (click to change), the pair will be difficult to observe as they will appear no higher than 11° above the horizon. They will be visible in the dawn sky, rising at 05:27 (EDT) – 1 hour and 26 minutes before the Sun – and reach an altitude of 11° above the eastern horizon before fading from view as dawn breaks at around 06:34.

Mercury will be at mag -0.9, and Mars at mag 1.8, both in the constellation Leo.

The pair will be close enough to fit within the field of view of a telescope, but will also be visible to the naked eye or through a pair of binoculars.

A graph of the angular separation between Mercury and Mars 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
Mercury 10h36m30s +10°05' Leo -0.9 6"3
Mars 10h36m30s +10°02' Leo 1.8 3"6

The coordinates above are given in J2000.0. The pair will be at an angular separation of 16° from the Sun, which is in Leo at this time of year.

The sky on 16 September 2017
Sunrise 06:51
Sunset 19:16
Twilight ends
20:46
Twilight begins
05:20

26-day old moon
Age of Moon
26 days

All times shown in EDT.
Rise Culm. Set
Mercury 05:26 12:02 18:39
Venus 04:30 11:19 18:08
Moon 03:02 10:03 17:05
Mars 05:26 12:03 18:39
Jupiter 09:25 14:59 20:34
Saturn 14:01 18:48 23:34

Warning

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.

Source

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.

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27 Jul 2017, 21:17 EDTMars at solar conjunction
27 Jul 2018, 01:07 EDTMars at opposition
02 Sep 2019, 07:01 EDTMars at solar conjunction
13 Oct 2020, 19:19 EDTMars 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.

Ashburn

Latitude:
Longitude:
Timezone:

39.04°N
77.49°W
EDT

Color scheme