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Messier 106 (M106, NGC 4258), spiral Galaxy type Sbp, in Canes Venatici

LRGB combination (Click for a larger view 900 x 1230 px)

 

Details

Messier 106 (M106, NGC 4258), spiral Galaxy type Sbp, in Canes Venatici

The bright Sb spiral galaxy Messier 106 (M106, NGC 4258) is perhaps about 21 to 25 million light years distant. While M106 is usually classified as peculiar "normal" spiral of type Sb (or Sbp), Tully classifies it as SABbc, i.e., intermediate between Sb and Sc, and intermediate between normal and barred spirals. M106 is a nearby example of the Seyfert class of active galaxies, seen across the spectrum from radio to x-rays.

Discovered by Pierre Méchain in 1781 and later, it was added to the catalog of his friend and colleague Charles Messier as M106.

Right Ascension 12 : 19.0 (h:m)
Declination +47 : 18 (deg:m)
Distance 21000 (kly)
Visual Brightness 8.4 (mag)
Apparent Dimension 19 x 8 (arc min)

Seeing: Pickering 7 rating - Good
Optic(s): Celestron 11" Schmidt Cassegrain + TS2" flattener @ f/8
Mount: ASA DDM85 Premium
Camera: ATIK 4000 - monochrome CCD – 2048 x 2048 px ; 16x16 mm; 7.4 µm x 7.4 µm
Filters: Astronomics L, R, G, B set, SupaSlim TrueTechnology Computerized Filter Wheel
Dates/Times: 2012-04-25
Location: Rozhen Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exposure Details:

L = 30 min, R = 30 min, G = 30 min, B = 30 min, (Bin 1), Subexposures = 15 min, Total Exposure Time - 120 min

More details: Dark and flat frames reduction
Guiding: All subexposures are unguided thanks to ASA DDM85 Premium mount
Processing:

PixInsight / PS

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All Contents copyright Velimir Popov unless otherwise noted.