Messier 100

27. Messier 100

Messier 100  RA: 12h 22.9'  Dec: +15 49'   Coma Berenices (Com)

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Messier 100 (also known as NGC 4321) is a grand design intermediate spiral galaxy in the southern part of the mildly northern Coma Berenices. It is one of the brightest and largest galaxies in the Virgo Cluster and is approximately 55 million light-years from our galaxy, its diameter being 107,000 light years, and being about 60% as large. It was discovered by Pierre Méchain in 1781 and 29 days later seen again and entered by Charles Messier in his catalogue "of nebulae and star clusters".. It was one of the first spiral galaxies to be discovered, and was listed as one of fourteen spiral nebulae by Lord William Parsons of Rosse in 1850. NGC 4323 and NGC 4328 are satellite galaxies of M100; the former is connected with it by a bridge of luminous matter.

Image Information

Location Fingal ON
Date May 30 2011
Optics Celestron C9.25
Filters f6.3 reducer/flattener
Mount Celestron CGE
Camera Canon Hutech 500DH
ISO 800
Subexposures 12
Exposure Length 300
Guider WO Zenithstar 66SD/ST-4

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All images copyright © 2006-2021, Rick Saunders
Main text descriptions sourced from Wikipaedia.
Sky position information is based on IP geolocation and is therefore approximate.