Aludra

Aludra is a blue supergiant (spectral type B5Ia) about 2,000 light-years away. With an apparent magnitude of 2.45 it is easy to see even from a city.

A star at the tail of Canis Major.

Its light output is roughly 33,700 times that of the Sun (a rough estimate in visible light, calculated from brightness and distance).

From Germany (52° N) it rises and sets; it is best seen in the evening in January.