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... М12 < М13 > М14 ...

Globular star cluster M13

Globular star cluster M13 or Great Globular Cluster in Hercules star cluster is in the constellation Hercules (Her).

M13

Equatorial coordinates (epoch J2000):
Ra 16h41.4m, Dec +36° 27'

Visual magnitude: 7,0m
Distance from the star clusters M13 to the Sun is 25890 light years
Angular size: 21'
Class: V
External dimensions the star clusters M13 are about 160 light years.
Estimated weight the star clusters: 600x103 suns

Discoverer: Edmund Halley, 1714 year.

The designation M13 in other catalogs: NGC 6205

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.
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.
Of course, these months are also not very dark, in addition the object is at midnight not at its highest point, whichprovides the least exposure and atmospheric distortion, but the sense is still there.The farther south the location of your observatory is located, the darker the sky will be


Nikolay Kurdyapin, astro-map.com  
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