Messier 106 also known as NGC 4258 is an intermediate spiral galaxy in the constellation Canes Venatici. It was discovered by Pierre Méchain in 1781. M106 is at a distance of about 22 to 25 million light-years away from Earth. It is also a Seyfert II galaxy and it is one of the largest and brightest nearby galaxies, similar in size and luminosity to the Andromeda Galaxy.
M106 is place of a galactic size MASER emission of water vapor at a frequency of 22GHz that evidences dense and warm molecular gas. [Wiki] |
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| Optic |
SW Quattro 8S 200mm f/4 with Baader MPCC Mark III corrector |
| Camera |
Atik 383L+ |
| Filters |
Baader L, 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 12:17:27 DEC 47:16:40 J2000
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Date
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April and May 2017
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Site
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Backyard, Busto G. Milan, Italy
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| Exposures
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L 24x900s bin 1x1 @-10°C
RGB 18x600s bin 2x2 each
Integration time - 18h
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Notes
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Some hint of Ha kindly provided by my friend Carl
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