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... М103 < М104 > М105 ...

Spiral galaxy M104

Spiral galaxy M104 or Sombrero is in the constellation Virgo (Vir).


Equatorial coordinates (epoch J2000):
Ra (α):12h40.0m, Dec (δ):-11° 37'

Visual magnitude: 8,0m
Distance from the galaxy M104 to the Sun is 44,7*106 light years
Angular size: 9'×4'
Class: Sb
External dimensions the galaxy M104 are about 105000 light years.
Estimated weight the galaxy: 300x109 suns
The mass of the central object (black hole): 1000x106 suns

Discoverer: Pierre François André Méchain, 11.05.1781 year.

The designation M104 in other catalogs: NGC 4594

Optimum magnification for a telescope with observations of M104, 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 M104 is May. 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 latitudes:the night sky in May is no longer very dark, so try also to observe M104 in April.
Of course, in April the object is at midnight not at its highest point, whichprovides the least exposure and atmospheric distortion. But, the darkness of the April sky greatly increases the contrast.The farther south the location of your observation is located, the darker the summer sky will be.

Мessier 103
Мessier 105

Nikolay Kurdyapin, astro-map.com  

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