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 1°59' of each other. The Moon will be 12 days old.

From Jacksonville , the pair will be visible in the evening sky, becoming accessible around 20:51 (EST), 25° above your south-eastern horizon, as dusk fades to darkness. They will then reach their highest point in the sky at 23:27, 37° above your southern horizon. They will continue to be observable until around 03:37, when they sink below 9° above your south-western horizon.

The Moon will be at mag -12.4; and Saturn will be at mag 0.0. Both objects will lie in the constellation Sagittarius.

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 18h16m20s 20°35'S Sagittarius -12.4 29'30"0
Saturn 18h15m50s 22°34'S Sagittarius 0.0 18"1

The coordinates above are given in J2000.0. The pair will be at an angular separation of 151° from the Sun, which is in Cancer at this time of year.

The sky on 25 Jul 2018

The sky on 25 July 2018
Sunrise
06:38
Sunset
20:25
Twilight ends
21:57
Twilight begins
05:06


Waxing Gibbous

96%

12 days old

Planets
Rise Culm. Set
Mercury 08:22 14:50 21:18
Venus 10:08 16:25 22:41
Moon 18:10 --:-- 04:40
Mars 20:49 01:48 06:46
Jupiter 14:30 19:57 01:24
Saturn 18:20 23:27 04:33
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.

Related news

27 Jun 2018  –  Saturn at opposition
06 Sep 2018  –  Saturn ends retrograde motion
29 Apr 2019  –  Saturn enters retrograde motion
09 Jul 2019  –  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.

Share