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Astr110 Photography Projects, Spring 2010

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Sombrero Galaxy , Jon Greydanus

Sombrero Galaxy

The Sombrero Galaxy, also known as M104, is located in the constellation Virgo. It is an "unbarred" spiral galaxy. The center bulge is actually a super massive black hole.The galaxy has a magnitude of +8 and is visible by an average telescope given good conditions. In the early 19th century the galaxy was thought to just be disc shaped gas cloud, but in the 1900's it was realized that the body was moving away from earth and it was realized that this was another galaxy. The galaxy also emits x-ray emissions which lead to the belief that there is a black hole at the center. The apparent dust could surrounding the center of the galaxy is where stars are being formed.

This picture displays the Sombrero Galaxy and the surrounding stars. This shows how bright the galaxy is. Despite the galaxy almost looking small next to the stars surrounding it, this is just because these stars are much closer than the galaxy. The dust lane gives the Sombrero Galaxy an almost holy looking aura. The angular size of the Sombrero Galaxy is 5.3 arc minutes and its linear size is about 45x10^3 ly. It is about 29 million light years away.

References:
Wikipedia, Sombrero Galaxy. <http://en.wikipedia.org/wiki/Sombrero_Galaxy>.

HubbleSite Photos. <http://hubblesite.org/newscenter/archive/releases/2003/28/image/a>

Chandra: Photo Album, Sombrero Galaxy. <http://chandra.harvard.edu/photo/2007/sombrero/>

Right Ascension (J2000) 12:39:59.30
Declination (J2000) -11:37:22
Filters used blue(B), green(V), red(R), and clear(C)
Exposure time per filter 5x60 seconds in BVRC
Date observed

10:13 UTC March 12, 2010 (BVRC)