🔭 M40 — Winnecke 4

Deep-sky object in Ursa Major

M40, Winnecke 4 is a deep-sky object in the constellation Ursa Major, with an apparent magnitude of about 8.4, roughly 0.51 thousand light-years away.

Data

Catalogue designation	M40
Common name	Winnecke 4
Object type	Deep-sky object
Constellation	Ursa Major
Apparent magnitude	8.4
Distance (approx.)	0.51 thousand light-years

What a deep-sky object is

A fainter or more ambiguous fuzzy patch in the sky — a star cloud, double star or object whose nature was debated long after Messier logged it as a comet-like smudge.

Other Messier objects in Ursa Major: M81, M82, M97, M101, M108, M109.

Data: Messier catalogue & IAU constellations, via English Wikipedia (CC BY-SA 3.0) · stored statically.