The Moon and Saturn will make a close approach, passing within 3°34' of each other. The Moon will be 23 days old.
From Cambridge , the pair will be visible in the dawn sky, rising at 02:47 (EDT) – 3 hours and 44 minutes before the Sun – and reaching an altitude of 22° above the southern horizon before fading from view as dawn breaks at around 05:59.
The Moon will be at mag -11.3 in Sagittarius; and Saturn will be at mag 0.3 in Ophiuchus.
They 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.
At around the same time, the pair will also share the same right ascension – called a conjunction.
A graph of the angular separation between the Moon and Saturn 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 |
| The Moon | 17h43m30s | 18°30'S | Sagittarius | -11.3 | 29'44"7 |
| Saturn | 17h42m30s | 22°04'S | Ophiuchus | 0.3 | 15"9 |
The coordinates above are given in J2000.0. The pair will be at an angular separation of 66° from the Sun, which is in Aquarius at this time of year.
The sky on 20 Feb 2017
| The sky on 20 February 2017 | ||||||||||||||||||||||||||||||||||
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25% 23 days old |
All times shown in EST.
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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
| 13 Aug 2016 | – Saturn ends retrograde motion |
| 06 Apr 2017 | – Saturn enters retrograde motion |
| 15 Jun 2017 | – Saturn at opposition |
| 25 Aug 2017 | – Saturn 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.