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... М108 < М109 > М110 ...

Spiral galaxy M109

Spiral galaxy M109 is in the constellation Ursa Major (UMa).


Equatorial coordinates (epoch J2000):
Ra (α):11h57.6m, Dec (δ):+53° 23'

Visual magnitude: 9,8m
Distance from the galaxy M109 to the Sun is 67,5*106 light years
Angular size: 8'×5'
Class: SBbc
External dimensions the galaxy M109 are about 137000 light years.
Estimated weight the galaxy: 250x109 suns

Discoverer: Pierre François André Méchain, 12.03.1781 year.

The designation M109 in other catalogs: NGC 3992

Optimum magnification for a telescope with observations of M109, 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 M109 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 108
Мessier 110

Nikolay Kurdyapin, astro-map.com  

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