Close approach of the Moon and Saturn

Dominic Ford, Editor
From the Appulses feed

Tags: Appulse

The Moon and Saturn will make a close approach, passing within 2°25' of each other. The Moon will be 19 days old.

From Fairfield , the pair will be visible in the morning sky, becoming accessible around 00:09, when they reach an altitude of 11° above your south-eastern horizon. They will then reach their highest point in the sky at 04:28, 38° above your southern horizon. They will be lost to dawn twilight around 04:43, 38° above your southern horizon.

The Moon will be at mag -12.5; and Saturn will be at mag 0.6. Both objects will lie in the constellation Aquarius.

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 22h39m50s 12°49'S Aquarius -12.5 32'47"9
Saturn 22h35m40s 10°37'S Aquarius 0.6 18"2

The coordinates above are given in J2000.0. The pair will be at an angular separation of 127° from the Sun, which is in Gemini at this time of year.

The sky on 7 Jul 2023

The sky on 7 July 2023
Sunrise
05:24
Sunset
20:28
Twilight ends
22:33
Twilight begins
03:19


Waning Gibbous

75%

19 days old

Planets
Rise Culm. Set
Mercury 05:58 13:30 21:02
Venus 08:46 15:36 22:25
Moon 23:22 04:40 10:09
Mars 09:02 15:53 22:43
Jupiter 01:31 08:24 15:16
Saturn 23:03 04:28 09:53
All times shown in EDT.

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.

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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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