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Contains:  IC 342
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IC342 Spiral Galaxy, 


            Jerry Macon
IC342 Spiral Galaxy

IC342 Spiral Galaxy

Technical card

Resolution: 3298x2413

Dates:Feb. 5, 2016

Frames:Baader LRGB 36mm Filters, L, R, G, B, Ha: 56x240" bin 1x1

Integration: 3.7 hours

Avg. Moon age: 26.24 days

Avg. Moon phase: 11.78% job: 1070746

RA center: 56.731 degrees

DEC center: 68.091 degrees

Pixel scale: 0.563 arcsec/pixel

Orientation: 89.023 degrees

Field radius: 0.319 degrees

Locations: Dark Star Observatory, Taos, New Mexico, United States


IC 342 (also known as Caldwell 5) is an intermediate spiral galaxy in the constellation Camelopardalis. The galaxy is near the galactic equator where dust obscuration makes it a difficult object for both amateur and professional astronomers to observe, though it can readily be detected even with binoculars. The dust of the Milky Way makes it difficult to determine the precise distance; modern estimates range from about 7 Mly to about 11 Mly.

IC 342 is one of the brightest two galaxies in the IC 342/Maffei Group of galaxies, one of the galaxy groups that is closest to the Local Group. The galaxy was discovered by William Frederick Denning in 1895. Edwin Hubble first thought it to be in the Local Group, but later it was demonstrated that the galaxy is outside the Local Group.

In 1935, Harlow Shapley declared that this galaxy was the third largest spiral galaxy by angular size then known, smaller only than the Andromeda Galaxy (M31) and the Triangulum Galaxy (M33), being wider that the full moon. (Modern estimates are more conservative, giving the apparent size as one-half to two-thirds the diameter of the full moon).

It has an H II nucleus.



Jerry Macon
License: Attribution Creative Commons

Sky plot

Sky plot


IC342 Spiral Galaxy, 


            Jerry Macon