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... М70 < М71 > М72 ...

Globular star cluster M71

Globular star cluster M71 is in the constellation Sagitta (Sge).


Equatorial coordinates (epoch J2000):
Ra 19h53.8m, Dec +18° 47'

Visual magnitude: 8,5m
Distance from the star clusters M71 to the Sun is 18330 light years
Angular size: 7'
Class: XII
External dimensions the star clusters M71 are about 40 light years.
Estimated weight the star clusters: 40x103 suns

Discoverer: Jean-Philippe Loys de Chéseaux, 1745 year.

The designation M71 in other catalogs: NGC 6838

Optimum magnification for a telescope with observations of M71, depending on the aperture of the telescope (D), is about D/3-0.8D. 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 M71 is August.

Nikolay Kurdyapin, astro-map.com  
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