Messier Index/M72

Messier 72 (also known as M72 or NGC 6981) is a w:globular cluster in the Aquarius constellation discovered by w:Pierre Méchain in w:August 29 w:1780. w:Charles Messier looked for it on the following w:October 4 and 5, and included it in his catalog. Both decided that it was a faint nebula not a cluster as is now believed. Using 10-inch (250 mm) telescopes, viewing the cluster is difficult resulting in only a view of a faint blurry picture, However using Kopernicks' 20-inch (510 mm) telescope resolution is highly increased. M72 is located at about 53,000 w:light-years away from w:Earth and lies in a considerable distance beyond the w:Galactic Center. Another source states that the cluster is 62,000 light-years away, with a diameter of 42 light-years. Generally considered a young cluster, the cluster has several blue giants, yet star clusters generally contain the oldest stars.

Messier 72
M72 from w:Hubble Space Telescope; 3.44′ view Credit: w:NASA/w:STScI/w:WikiSky
Observation data (w:J2000 epoch)
Constellation	Aquarius
Right ascension	20h 53m 27.91s
Declination	-12° 32′ 13.4″
Distance	53-62 kly (16-19 kpc)
Physical characteristics
Mass	kg ( M${\odot }$)
Notable features	Contains several blue giants
Other designations	NGC 6981, GCl 118

External links

• Messier 72, SEDS Messier pages
• Messier 72, Galactic Globular Clusters Database page
• Messier 72, LRGB CCD image based on two hours total exposure
• M-72 Information