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... М4 < М5 > М6 ...
Globular star cluster M5
Globular star cluster M5 is in the constellation Serpens (Ser).
Equatorial coordinates (epoch J2000):
Visual magnitude: 5,6m - this object can be seen with the naked eye on a black sky, in the absence of illumination from street lighting.
Optimum magnification for a telescope with observations of M5, 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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