Globular star cluster M30
Globular star cluster M30 is in the constellation Capricornus (Cap).
Equatorial coordinates (epoch J2000):
Ra 21h 40.4m, Dec -23° 11'
Visual magnitude: 8,5m
Distance to the star clusters M30 to the Sun is 29460 light years
Angular size: 12'
External dimensions the star clusters M30 are about 100 light years.
Estimated weight the star clusters: 300x103 suns
Discoverer: Charles Messier, 1764 year.
The designation M30 in other catalogs: NGC 7099
M30 in the middle latitudes is located quite low above the horizon, so observation is difficult due to atmospheric distortions.
In the northern latitudes is not visible.Optimum magnification for a telescope with observations of M30, 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 M30 is September.
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