Everything about Messier 14 totally explained
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Messier 14 (also known as
M14 or
NGC 6402) is a
globular cluster in the
constellation Ophiuchus. It was discovered by
Charles Messier in
1764.
At a distance of about 30,000 light-years, M14 contains several 100,000
stars. At a brightness of
magnitude 7.6 it can be easily observed with
binoculars and medium sized
telescopes begin to show some hint of the individual stars of which the brightest is of magnitude +14.
The total
luminosity of M14 is in the order of 400,000 times that of the
Sun corresponding to an
absolute magnitude of -9.12. The shape of the cluster is decidedly elongated. M14 spans about 100 light-years across.
A respectable total of 70
variable stars are known in M14, many of the
W Virginis variety common in globular clusters. In
1938, a
nova appeared in this globular cluster although this wasn't discovered until photographic plates from that time were studied in
1964. It is estimated that the nova reached a maximum brightness of magnitude +9.2, over 5 times brighter than the brightest "normal" star in the cluster.
Slightly over 3° southwest of M14 lies the faint globular cluster
NGC 6366.
Further Information
Get more info on 'Messier 14'.
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