The planets Jupiter and Saturn will make a close approach, passing within 7°01' of each other.
From Cambridge, the pair will be visible in the evening sky, becoming accessible around 18:19 (EDT) as the dusk sky fades, 69° above your southern horizon. They will then reach their highest point in the sky at 18:43, 70° above your southern horizon. They will continue to be observable until around 01:24, when they sink below 7° above your north-western horizon.
Jupiter will be at mag -2.4; and Saturn will be at mag -0.3. Both objects will lie in the constellation Gemini.
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.
A graph of the angular separation between Jupiter 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 coordinates above are given in J2000.0. The pair will be at an angular separation of 112° from the Sun, which is in Pisces at this time of year.
|The sky on 18 April 2021|
6 days old
All times shown in EDT.
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.
|19 Mar 2299||– Saturn ends retrograde motion|
|20 Jul 2299||– Saturn at solar conjunction|
|19 Nov 2299||– Saturn enters retrograde motion|
|25 Jan 2300||– Saturn at opposition|
The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.