The Moon and Jupiter will share the same right ascension, with the Moon passing 3°57' to the south of Jupiter. The Moon will be 11 days old.
From Seattle, the pair will be visible in the evening sky, becoming accessible around 19:36 (PDT), 11° above your south-eastern horizon, as dusk fades to darkness. They will then reach their highest point in the sky at 23:08, 27° above your southern horizon. They will continue to be observable until around 03:07, when they sink below 7° above your south-western horizon.
The Moon will be at mag -12.6, and Jupiter at mag -2.8, both in the constellation Capricornus.
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 Jupiter 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 coordinates above are given in J2000.0. The pair will be at an angular separation of 146° from the Sun, which is in Virgo at this time of year.
|The sky on 17 September 2021|
10 days old
All times shown in PDT.
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 Aug 2021||– Jupiter at opposition|
|26 Sep 2022||– Jupiter at opposition|
|02 Nov 2023||– Jupiter at opposition|
|07 Dec 2024||– Jupiter at opposition|
The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.