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Globular star cluster M15

Globular star cluster M15 is in the constellation Pegasus (Peg).

M15

Equatorial coordinates (epoch J2000):
Ra 21h 30.0m, Dec +12° 10'

Visual magnitude: 7,5m
Distance to the star clusters M15 to the Sun is 39010 light years
Angular size: 18'
Class: IV
External dimensions the star clusters M15 are about 200 light years.
Estimated weight the star clusters: 450x103 suns

Discoverer: Giovanni Domenico Maraldi, 1746 year.

The designation M15 in other catalogs: NGC 7078

Optimum magnification for a telescope with observations of M15, depending on the aperture of the telescope (D), is about D/2-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 M15 is September.



Nikolay Kurdyapin, astro-map.com  
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