subgiant · B0.5IVe

Navi

Navi is a blue subgiant (spectral type B0.5IVe) about 550 light-years away. With an apparent magnitude of 2.15 it is easy to see even from a city.

The middle star of Cassiopeia's "W". The astronaut Gus Grissom named it – his middle name Ivan spelled backwards.

Its light output is roughly 3,400 times that of the Sun (a rough estimate in visible light, calculated from brightness and distance).

From Germany (52° N) it never sets: it stays above the horizon all year.

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Key facts

Distance
≈ 550 light-years
Spectral type
B0.5IVe (subgiant)
Colour
Blue
Apparent magnitude
2.15 mag
Luminosity
≈ 3,400 × Sun
Position
Right ascension 0h 57m, declination 60.7°

More well-known stars

Data: Hipparcos / HYG catalogue (CC BY-SA 4.0). Luminosity and visibility are calculated estimates.