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... М12 < М13 > М14 ...
Globular star cluster M13
Globular star cluster M13 or Great Globular Cluster in Hercules is in the constellation Hercules (Her).
Equatorial coordinates (epoch J2000):
Visual magnitude: 7,0m
Optimum magnification for a telescope with observations of M13, 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 M13 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 M13 also in May and in July.
Nikolay Kurdyapin, astro-map.com
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