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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):
Ra (α):15h18.6m, Dec (δ):+02° 05'

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.
Distance from the star clusters M5 to the Sun is 26620 light years
Angular size: 20'
Class: V
External dimensions the star clusters M5 are about 150 light years.
Age of the object M5 is 13x109 years
Estimated weight the star clusters: 800x103 suns

Discoverer: Gottfried & Maria Kirch, 05.05.1702 year.

The designation M5 in other catalogs: NGC 5904

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.
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.

Мessier 4
Мessier 6

Nikolay Kurdyapin, astro-map.com  

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