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M41, a 5th-magnitude open cluster in Canis Major.

M41 is a large (~1/2 degree wide), bright cluster. It is easy to find in binoculars, about 4 degrees south of Sirius. The "tails" below the two brightest stars are caused by blooming; the brightest stars also have diffraction spikes. 5-sec exposure, 20 Nov 1995, 12:56 UT.


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