Deep space
Winnecke 4
Optical double · M40
Optical double in Ursa Major
Photo: Wikimedia Commons · Public domain · Wikimedia Commons
Winnecke 4 is an optical double star consisting of two unrelated stars in a northerly zone of the sky, Ursa Major.
Description from Wikipedia (CC BY-SA 4.0).
In your sky
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Key facts
Distance
~510 light-years
Apparent mag.
+8.4
Apparent size
51.7″
Best seen with
Binoculars
Catalogue
M40
Did you know
- Listed as Messier 40 in the Messier catalogue.
- Found in the constellation Ursa Major.
- Within reach of ordinary binoculars under dark skies.
