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

M4 is well placed

Sun, 28 May 2017 (267 days ago)

Dominic Ford, Editor
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The globular cluster M4 (NGC 6121) in Scorpius will be well placed for observation. It will reach its highest point in the sky at around midnight local time.

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

From Ashburn (click to change), it will be visible between 23:45 and 02:29. It will become accessible at around 23:45, when it rises 21° above your southern horizon, and then reach its highest point in the sky at 01:09, 24° above your southern horizon. It will become inaccessible at around 02:29 when it sinks to 21° above your southern horizon.

At magnitude 5.9, M4 is quite faint, and certainly not visible to the naked eye, but can be viewed 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' Scorpius 5.9 26'18"

The coordinates above are given in J2000.0.

The sky on 28 May 2017
Sunrise 05:46
Sunset 20:25
Twilight ends
Twilight begins

3-day old moon
Age of Moon
3 days

All times shown in EDT.
Rise Culm. Set
Mercury 04:47 11:35 18:23
Venus 03:42 10:07 16:31
Moon 09:00 16:08 23:16
Mars 06:53 14:22 21:51
Jupiter 15:43 21:33 03:28
Saturn 21:35 02:26 07:13


The circumstances of this event were computed using the DE405 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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