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NGC 925 (UGC 1913) - barred spiral galaxy type SBc/Sc in Triangulum.

LRGB combination 100% crop - (Click for a larger view 1800 px x 1800 px)

 

 

LRGB combination - (Click for a larger view 1800 px x 1800 px)

Details

NGC 925 (UGC 1913) - barred spiral galaxy type SBc/Sc in Triangulum

Discovered by William Herschel in 1784.

NGC 925 (UGC 1913) is a very asymmetric galaxy with a strong spiral arm in the south and flocculent arms in the north. NGC 925 has at least 132 cataloged HII regions. It is about 45 million light-years away. The real diameter of the galaxy is nearly 100000 light-years. Delicate spiral arms extend outward from the central bar. Older yellowish suns dominate the central bar, while blue-white star clusters and red hydrogen emission nebulae make up the spiral arms.

North is up. The Horizontal FOV is about 35' (crop from original FOV). The image almost centered at:

Right Ascension 02:27:16.8 (h:m:s)
Declination +33:34:44.5 (deg:m:s)
Distance 106 000 (kly)
Visual Brightness B=10.5, V=9.9 (mag)
Apparent Dimension 11.22' x 6.309' (arc min)

Optic(s): RC 12" with Astro-Physics corrector @ f/5
Mount: ASA DDM85 Premium
Camera: ATIK 4000 - monochrome CCD – 2048 x 2048 px ; 16x16 mm; 7.4 µm x 7.4 µm
Filters: Astronomik LRGB set, SupaSlim TrueTechnology Computerized Filter Wheel
Dates/Times: 2012-09-12
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exposure Details:

L = 100 min, R = 60 min, , G = 60 min, , B = 60 min, subs. 10 min, Bin 1, Total Exposure Time - 280 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.