Zeta Puppis
Star
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Zeta Puppis, formally named Naos, is the brightest star in the constellation of Puppis.
The spectral class of O4 means this is one of the hottest, and most luminous, stars visible to the naked eye. It is one of the sky's few naked-eye class O-type... Wikipedia
Surface temperature: 42,000 K
Luminosity: 790,000 L☉
Spectral type: O4If(n)p
Mass: 4.475 × 10^31 kg (22.5 M☉)
Magnitude: 2.21
Constellation: Puppis
Radius: 6.052 million mi (14 R☉)