The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.

Close approach of the Moon and Saturn

Dominic Ford, Editor
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The sky at

The Moon and Saturn will make a close approach, passing within 3°40' of each other. The Moon will be 10 days old.

From San Diego , the pair will be visible in the evening sky, becoming accessible around 19:19 (PDT), 27° above your south-eastern horizon, as dusk fades to darkness. They will then reach their highest point in the sky at 21:41, 37° above your southern horizon. They will continue to be observable until around 01:54, when they sink below 10° above your south-western horizon.

Begin typing the name of a town near to you, and then select the town from the list of options which appear below.

The Moon will be at mag -12.5; and Saturn will be at mag 0.2. Both objects will lie in the constellation Capricornus.

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 20h42m00s 22°52'S Capricornus -12.5 31'38"5
Saturn 20h38m30s 19°17'S Capricornus 0.2 18"0

The coordinates above are given in J2000.0. The pair will be at an angular separation of 132° from the Sun, which is in Virgo at this time of year.

The sky on 16 Sep 2021

The sky on 16 September 2021
Sunrise
06:30
Sunset
18:53
Twilight ends
20:15
Twilight begins
05:07

9-day old moon
Waxing Gibbous

87%

9 days old

Planets
Rise Culm. Set
Mercury 08:39 14:14 19:49
Venus 09:55 15:19 20:42
Moon 16:40 21:46 02:58
Mars 07:05 13:09 19:12
Jupiter 17:24 22:48 04:12
Saturn 16:31 21:41 02:52
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

01 Aug 2021  –  Saturn at opposition
10 Oct 2021  –  Saturn ends retrograde motion
04 Jun 2022  –  Saturn enters retrograde motion
14 Aug 2022  –  Saturn at opposition

Image credit

The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.

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San Diego

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Longitude:
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32.72°N
117.16°W
PDT

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