Dominic Ford, Editor
From the Deep Sky feed
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 Cambridge, it will be visible between 00:12 and 01:08. It will become accessible at around 00:12, when it rises 20° above your southern horizon, and then reach its highest point in the sky at 00:40, 21° above your southern horizon. It will become inaccessible at around 01:08 when it sinks to 20° above your southern horizon.
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|
The coordinates above are given in J2000.0.
|The sky on 29 May 2017|
4 days old
All times shown in EDT.
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.
© Digitised Sky Survey (DSS); Second Palomar Observatory Sky Survey (POSS-II)