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 3°09' of each other. The Moon will be 23 days old.

From Cambridge , the pair will be visible in the morning sky, becoming accessible around 00:42, when they reach an altitude of 11° above your eastern horizon. They will then reach their highest point in the sky at 05:49, 50° above your southern horizon. They will be lost to dawn twilight around 06:24, 49° above your southern horizon.

The Moon will be at mag -12.0; and Saturn will be at mag 0.8. Both objects will lie in the constellation Virgo.

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 12h02m20s 5°29'N Virgo -12.0 31'49"7
Saturn 11h57m20s 2°36'N Virgo 0.8 17"6

The coordinates above are given in J2000.0. The pair will be at an angular separation of 88° from the Sun, which is in Sagittarius at this time of year.

The sky on 4 May 2025

The sky on 4 May 2025
Sunrise
05:33
Sunset
19:47
Twilight ends
21:38
Twilight begins
03:41


Waxing Gibbous

56%

7 days old

Planets
Rise Culm. Set
Mercury 04:50 11:12 17:35
Venus 03:52 10:00 16:07
Moon 11:57 19:21 02:33
Mars 11:08 18:31 01:54
Jupiter 07:42 15:16 22:51
Saturn 03:55 09:48 15:42
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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