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... М1 < М2 > М3 ...
Globular star cluster M2
Globular star cluster M2 is in the constellation Aquarius (Aqr).
Equatorial coordinates (epoch J2000):
Visual magnitude: 6,3m
Optimum magnification for a telescope with observations of M2, 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.
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Nikolay Kurdyapin, astro-map.com
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