The Moon, Venus and Mars will make a close approach, passing within 5°28' of each other. The Moon will be 3 days old.
From Cambridge , the trio will become visible at around 20:41 (EDT), 18° above your western horizon, as dusk fades to darkness. They will then sink towards the horizon, setting 2 hours and 6 minutes after the Sun at 22:26.
The Moon will be at mag -10.5 in Sextans; Venus will be at mag -4.1 in Leo; and Mars will be at mag 1.3 in Leo.
They will be too widely separated to fit within the field of view of a telescope or pair of binoculars, but will be visible to the naked eye.
At around the same time, the trio will also share the same right ascension – called a conjunction.
A graph of the angular separation between the Moon and Venus around the time of closest approach is available here.
The positions of the trio at the moment of closest approach will be as follows:
| Object | Right Ascension | Declination | Constellation | Magnitude | Angular Size |
| The Moon | 10h19m00s | 5°58'N | Sextans | -10.5 | 32'56"3 |
| Venus | 10h28m10s | 10°56'N | Leo | -4.1 | 17"1 |
| Mars | 10h30m40s | 10°32'N | Leo | 1.3 | 5"5 |
The coordinates above are given in J2000.0. The trio will be at an angular separation of 42° from the Sun, which is in Gemini at this time of year.
The sky on 28 Sep 2024
| The sky on 28 September 2024 | ||||||||||||||||||||||||||||||||||
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8% 25 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.
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| 07 Jun 2010 | – Venus at highest altitude in evening sky |
| 19 Aug 2010 | – Venus at greatest elongation east |
| 15 Dec 2010 | – Venus at highest altitude in morning sky |
| 08 Jan 2011 | – Venus at greatest elongation west |
Image credit
The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.