Hellenica World

Messier 18

M18 photo from the 2MASS project. "Atlas Image [or Atlas Image mosaic] obtained as part of the Two Micron All Sky Survey (2MASS), a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation."

Messier 18
Observation data (J2000.0 epoch)
Right ascension 18h 19.9m
Declination −17° 08′
Distance 4.9 kly (1.5 kPc)
Apparent magnitude (V) 7.5
Apparent dimensions (V) 9.0′
Other designations NGC 6613
See also: Open cluster, List of open clusters

Open Cluster M18 (also known as Messier Object 18 or NGC 6613) is an open cluster in the constellation Sagittarius. It was discovered by Charles Messier in 1764 and included in his list of comet-like objects. M18 is situated between the Omega Nebula (M17) and the Sagittarius Star Cloud (M24). Its age is estimated at 32 million years.

Links
Messier 18

Messier 18, SEDS Messier pages





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