Messier 92 (also known as M92 or NGC 6341) is a globular cluster of stars in the northern constellation of Hercules. It was discovered by Johann Elert Bode in 1777, then published in the Jahrbuch during 1779.The cluster was independently rediscovered by Charles Messier on March 18, 1781 and added as the 92nd entry in his catalogue. M92 is at a distance of about 26,700 light-years away from Earth.M92 is one of the brighter globular clusters in the northern hemisphere, but it is often overlooked by amateur astronomers because of its proximity to the even more spectacular Messier 13. It is visible to the naked eye under very good conditions.Among the Milky Way population of globular clusters, Messier 92 is among the brighter clusters in terms of absolute magnitude. It is also one of the oldest clusters. Messier 92 is located around 16 kly (4.9 kpc) above the galactic plane and 33 kly (10 kpc) from the Galactic Center. The heliocentric distance of Messier 92 is 26.7 kly (8.2 kpc). The half-light radius, or radius containing half of the light emission from the cluster, is 1.09 arcminutes, while the tidal radius is 15.17 arcminutes. It appears only slightly flattened, with the minor axis being about 89% ± 3% as large as the major axis.
The name Hercules is from a Latin translation of Greek Herakles. Herakles' name is translated 'the glory of Hera' or 'the fame of Hera', the prefix of his name relates to Hera, wife of Zeus, the suffix is from Greek -kles, related to Latin cluere, variously translated; 'to listen', 'to hear oneself called', 'to be spoken of', 'called upon'. This constellation is said to represent the Roman Hercules, Greek Herakles, who was the greatest of the Greek heroes and famous for his twelve labors. As an infant Hercules strangled two serpents sent by Juno to kill him as he lay asleep in his cradle. It is suggested that the two serpents represent the the Lunar Nodes. He died on a funeral pyre, became a god, and ascended to Mount Olympus to join the other gods. Engonasin is a Greek title for Hercules, with Roman writers translating it Geniculator or Geniculatus; these terms meaning 'the Kneeling Man'.
Found in HGS Manual on Page 108 Found in HGS Manual on Page 115