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Winnecke 4 (M40)

Winnecke 4 (M40) is a star cluster (double star) object of interest in space. It lies at a distance of 510 light years away in the constellation of Ursa Major.

It is referred to as M(40) when it was catalogued by Charles Messier in 18th - 19th Century France. Winnecke 4 (M40) was discovered in 1764 by Charles Messier.

The Star Cluster (Double Star)'s location is 12:22.4 (R.A.) and +58:05 (Dec.). Its Visual Brightness is a 8.4 Magnitude and has an apparent magnitude of 10 with an apparent dimension of 0.8 . The object can not be seen by the naked eye, you need a telescope to see it.

Fact File


NameWinnecke 4 (M40)
TypeStar Cluster (Double Star)
Messier Id40
ConstellationUrsa Major
Right Ascension12:22.4
Declination+58:05
Distance (Lt.Yr)510
Visual Brightness8.4
Apparent Dimension0.8
Apparent Magnitude10
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Year of Discovery1764
DiscovererCharles Messier


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