The Moon and Mars will share the same right ascension, with the Moon passing 4°13' to the north of Mars. The Moon will be 15 days old.
At around the same time, the two objects will also make a close approach, technically called an appulse.
From Cambridge , the pair will be visible between 19:55 and 05:23. They will become accessible at around 19:55, when they rise to an altitude of 7° above your eastern horizon. They will reach their highest point in the sky at 00:39, 39° above your southern horizon. They will become inaccessible at around 05:23 when they sink below 7° above your western horizon.
The Moon will be at mag -12.6, and Mars at mag -2.8, 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 to the naked eye or through a pair of binoculars.
A graph of the angular separation between the Moon 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 |
| The Moon | 23h38m40s | 4°06'S | Aquarius | -12.6 | 30'57"5 |
| Mars | 23h38m40s | 8°20'S | Aquarius | -2.8 | 24"4 |
The coordinates above are given in J2000.0. The pair will be at an angular separation of 178° from the Sun, which is in Virgo at this time of year.
The sky on 17 Sep 2035
| The sky on 17 September 2035 | ||||||||||||||||||||||||||||||||||
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99% 15 days old |
All times shown in EDT.
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Source
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
| 15 Sep 2035 | – Mars at opposition |
| 15 Oct 2035 | – Mars ends retrograde motion |
| 12 Oct 2037 | – Mars enters retrograde motion |
| 11 Nov 2037 | – Mars at perigee |
Image credit
The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.