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Globular star cluster M15

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

Equatorial coordinates (epoch J2000):
Ra (α):21^h30.0^m, Dec (δ):+12° 10'

Visual magnitude: 7,5^m
Distance from 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. At this time, the object is at midnight near its highest point in the sky, that is, it is less affected by light from the lanterns and atmospheric distortions.

Мessier 14

Мessier 16

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