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IC 342 (Hidden Galaxy) - Spiral Galaxy type Scd in Camelopardalis

LRGB combination - (Click for a larger view 1300 px x 1300 px) - scroll down for more images

 

© Velimir Popov & Emil Ivanov 2013

Details

IC 342 (Hidden Galaxy) - Spiral Galaxy type Scd in Camelopardalis

IC 342 was discovered in 1895 by W.F. Denning. IC 342 is about 10 million light-years distant. IC 342 lies at low galactic latitude, only 10.5 degrees from the Galactic Equator, or the Milky Way's disc plane. Therefore, it is heavily obscured by interstellar matter of the Milky Way. Recent estimates give an extinction of about 2.4 magnitudes; without this extinction, this galaxy would be among the brightest in the sky.

IC 342 forms a group with some large and many dwarf galaxies, the so-called Maffei 1 group, or IC 342 group, or somtimes called IC 342/Maffei group. It is one of two dominating members of that group, the other being elliptical galaxy Maffei 1, which is even more obscurred and was thus only discovered in 1968.

Object details

Right Ascension 03:46:49.1 (h:m:s)
Declination +68:05:47.4 (deg:m:s)
Distance 10 (Mly)
Apparent Dimension 21.37 x 20.89 (arc min)

Image details

The image was crop to 60% of the original size due to strong vignetting in the corners

Annotation

Center of field RA 03:46:41.15 (h:m:s)
Center of field DE +68:06:23.04 (deg:m:s)
Size 22.6 x 22.6 (arcmin)
Pixel scale: 1.04 (arcsec/pixel)
Orientation: North is up

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: From 21.10.2013 to 2.11.2013
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exposure Details:

L = 140 min, R = 100 min, G = 100 min, B = 100 min, subs. 10 min, Bin 1, Total Exposure Time - 440 min (7:20 hours)

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.