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... М107 < М108 > М109 ...

Spiral galaxy M108

Die Sternhaufen M108 is in the constellation Ursa Major (UMa).


Equatorial coordinates (epoch J2000):
Ra (α):11h11.5m, Dec (δ):+55° 40'

Visual magnitude: 10,0m
Distance from the galaxy M108 to the Sun is 46,0*106 light years
Angular size: 9'×2'
Class: Sc
External dimensions the galaxy M108 are about 100000 light years.

Discoverer: Pierre François André Méchain, 16.02.1781 year.

The designation M108 in other catalogs: NGC 3556

Optimum magnification for a telescope with observations of M108, depending on the aperture of the telescope (D), is about D/6-D/3. 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 M108 is April. 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.

Мessier 107
Мessier 109

Nikolay Kurdyapin, astro-map.com  

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