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... М4 < М5 > М6 ...
Globular star cluster M5
Die Sternhaufen 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.
The best month for observing M5 is June. 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.
For observers in the northern and middle latitudes:The nights in June are very light, so try to observe M5 also in May and in July.
Nikolay Kurdyapin, astro-map.com
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