The planets Mars and Neptune will make a close approach, passing within a mere 26.7 arcminutes of each other.
From South El Monte , the pair will be visible in the dawn sky, rising at 02:27 (PDT) and reaching an altitude of 35° above the south-eastern horizon before fading from view as dawn breaks at around 05:46.
Mars will be at mag 1.6; and Neptune will be at mag 8.0. Both objects will lie in the constellation Virgo.
They will be close enough to fit within the field of view of a telescope, but will also be visible through a pair of binoculars.
At around the same time, the pair will also share the same right ascension – called a conjunction.
A graph of the angular separation between Mars and Neptune around the time of closest approach is available here.
The positions of the pair at the moment of closest approach will be as follows:
| Object | Right Ascension | Declination | Constellation | Magnitude | Angular Size |
| Mars | 13h38m40s | 8°57'S | Virgo | 1.6 | 4"6 |
| Neptune | 13h39m20s | 8°32'S | Virgo | 8.0 | 2"2 |
The coordinates above are given in J2000.0. The pair will be at an angular separation of 55° from the Sun, which is in Ophiuchus at this time of year.
The sky on 9 Sep 2025
| The sky on 9 September 2025 | ||||||||||||||||||||||||||||||||||
|
90% 17 days old |
All times shown in PDT.
|
|||||||||||||||||||||||||||||||||
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
| 02 Jul 1953 | – Neptune ends retrograde motion |
| 27 Jan 1954 | – Neptune enters retrograde motion |
| 14 Apr 1954 | – Neptune at opposition |
| 05 Jul 1954 | – Neptune ends retrograde motion |
Image credit
The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.