© Digitised Sky Survey (DSS); Second Palomar Observatory Sky Survey (POSS-II)

M4 is well placed

Dominic Ford, Editor
From the Deep Sky feed

Objects: M4
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The globular cluster M4 (NGC 6121; mag 5.6) in Scorpius will be well placed, high in the sky. It will reach its highest point in the sky at around midnight local time.

At a declination of 26°31'S, it is easiest to see from the southern hemisphere but cannot be seen from latitudes much north of 43°N.

From Ashburn, it will be visible between 23:31 and 02:40. It will become accessible around 23:31, when it rises to an altitude of 20° above your south-eastern horizon. It will reach its highest point in the sky at 01:05, 24° above your southern horizon. It will become inaccessible around 02:40 when it sinks below 20° above your southern horizon.

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At magnitude 5.4, M4 is too faint to be seen with the naked eye from any but the very darkest sites, but is visible through a pair of binoculars or small telescope.

The position of M4 is as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
M4 16h23m30s 26°31'S Scorpius 5.4 26'18"

The coordinates above are given in J2000.0.

The sky on 29 May 2021
Twilight ends
Twilight begins

18-day old moon
Waning Gibbous


18 days old

Rise Culm. Set
Mercury 06:49 14:15 21:41
Venus 06:49 14:17 21:46
Moon 23:19 04:00 08:41
Mars 08:50 16:14 23:38
Jupiter 01:31 06:55 12:18
Saturn 00:40 05:44 10:48
All times shown in EDT.


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.

Image credit

© Digitised Sky Survey (DSS); Second Palomar Observatory Sky Survey (POSS-II)






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