Globular Cluster Messier 72

Messier 72
Messier 72: Image taken with the Hubble Space Telescope. © ESA/Hubble & NASA [245]


The globular cluster was discovered by Pierre Méchain on the night of August 29th to 30th, 1780 and again visited and confirmed by Charles Messier on the night of October 4th to 5th. He described it as «faintly shining like the previous one [M 71] with a small star next to it.» [196, 281]

Physical Properties

M 72 is 17 kpc (55'500 light years) from Earth and 12.9 kpc (47'000 light years) from the galactic center. It has the mass of 168'000 suns. [148, 251]

Revised+Historic NGC/IC, Version 22/9, © Dr. Wolfgang Steinicke [277]
DesignationNGC 6981
TypeGCL (IX)
Right Ascension20h 53m 27.9s
Declination-12° 32' 11"
Diameter6.6 arcmin
Visual magnitude9.2 mag
Metric Distance17.000 kpc
Dreyer Descriptionglobular, pB, pL, R, gmCM, rrr
Identification, RemarksM 72, GCL 118

Finder Chart

M 72 is located in the constellation Aquarius. On the line between the stars Albali (ε Aquarii) and θ Capricorni, it lies roughly in the first third. About 1° 20' east of it is the small star group M 73. The best observation time is August to October.

Chart Globular Cluster Messier 72
Globular Cluster Messier 72 in constellation Aquarius. Charts created using SkySafari 6 Pro and STScI Digitized Sky Survey. Limiting magnitudes: Constellation chart ≈ 6.5 mag, DSS2 close-ups ≈ 20 mag. [149, 160]

Visual Observation

Pending ...

More Objects Nearby (±20°)


148«A Catalog of Parameters for Globular Clusters in the Milky Way» Harris, William E.; Astronomical Journal v.112, p.1487, October 1996 / Revision: December 2010; DOI:10.1086/118116; Bibcode:1996AJ....112.1487H; (2021-01-03)
149SkySafari 6 Pro, Simulation Curriculum;
160The STScI Digitized Sky Survey;
196Celestial Atlas by Curtney Seligman; (2020-12-28)
245Bucking the trend; (2021-01-22)
251«Young Radio Pulsars in Galactic Globular Clusters» Jason Boyles, Duncan R. Lorimer, Phil J. Turk, Robert Mnatsakanov, Ryan S. Lynch, Scott M. Ransom, Paulo C. Freire, Khris Belczynski; The Astrophysical Journal, Volume 742, Number 1; DOI:10.1088/0004-637X/742/1/51; (2021-01-24)
277«Historische Deep-Sky Kataloge» von Dr. Wolfgang Steinicke; (2021-02-17)
281«Catalogue Nébuleuses et des Amas D'Étoiles» Observées à Paris, par M. Messier, à l'Observatoire de la Marine, hôtel de Clugni, rue des Mathurins. «Connoissance des temps ou connoissance des mouvements célestes, pour l'année bissextile 1784 » Page 227; (2021-02-21)