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... М71 < М72 > М73 ...

Globular star cluster M72

Globular star cluster M72 is in the constellation Aquarius (Aqr).


Equatorial coordinates (epoch J2000):
Ra 20h53.5m, Dec -12° 32'

Visual magnitude: 10,0m
Distance from the star clusters M72 to the Sun is 58510 light years
Angular size: 6'
Class: IX
External dimensions the star clusters M72 are about 100 light years.
Estimated weight the star clusters: 200x103 suns

Discoverer: Pierre François André Méchain, 1780 year.

The designation M72 in other catalogs: NGC 6981

Optimum magnification for a telescope with observations of M72, depending on the aperture of the telescope (D), is about D/3-D. Higher magnifications of course add details, but lead to a strong drop in the brightness of the image, making it difficult to observe.
The best month for observing M72 is September.

Nikolay Kurdyapin, astro-map.com  
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