Messier 100 (also known as NGC4321) is a grand design intermediate spiral galaxy located within the southern part of constellation Coma Berenice. It is one of the brightest and largest galaxies in the Virgo Cluster, located approximately 55 million light-years distant from Earth and has a diameter of 107,000 light years. It was discovered by Pierre Méchain on March 15, 1781 and was subsequently entered in Messier's catalogue of nebulae and star clusters after Charles Messier made observations of his own on April 13, 1781.
The galaxy 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. [Wiki] |
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| Optic |
SW Quattro 8S 200mm f/4 with Baader MPCC Mark III corrector |
| Camera |
Atik 383L+ |
| Filters |
Baader R, G, B 36mm, IDAS LPS-P2 |
| Mount |
NEQ6 with EQASCOM
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Guide
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SW 70/500 with AlCCD5
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Frame center
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RA 12:22:57 DEC 15:42:03 J2000
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Date
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24 April 2020
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Site
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Astrobioparco di Felizzano, AL, Italy
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| Exposures
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L - 30x600s @-10C bin 1x1
RGB - 12x600s bin 1x1 each
Integration time - 11h
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