Messier 13 or
M13, also designated
NGC 6205 and sometimes called the
Great Globular Cluster in Hercules or the
Hercules Globular Cluster, is a
globular cluster of several hundred thousand
stars in the
constellation of
Hercules. Messier 13 was discovered by
Edmond Halley in 1714,=10.5px and cataloged by
Charles Messier on June 1, 1764,=10.5px into his list of objects not to mistake for
comets; Messier's list, including Messier 13, eventually became known as the
Messier catalog.=10.5px It is located at
right ascension 16h 41.7m,
declination +36° 28'. Messier 13 is often described by astronomers as the most magnificent globular cluster visible to northern observers.=10.5px About one third of the way from Vega to Arcturus, four bright stars in
Herculēs form the Keystone
asterism, the broad torso of the hero. M13 can be seen in this asterism 2⁄3 of the way north (
by west) from
Zeta to
Eta Herculis. With an
apparent magnitude of 5.8,
[2] Messier 13 may be visible to the
naked eye with
averted vision on dark nights.
SOURCE: Wikipedia
Lum 30 x 45s bin 1x1
Red 42 x 60s bin 1x1
Grn 40 x 60s bin 1x1
Blu 40 x 60s bin 1x1
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