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Proper NameNone
DesignationsProxima Centauri b, Proxima b, Alpha Centauri C b, Gliese 551 b
ClassificationEarth-mass planet
Orbital Period11 days, 4 hours
Mean Distance from Proxima Centauri7.3 million km
0.049 AU
Mass1.17 x Earth
DiameterNot known
Temperature234K (-39°C)
Parent starProxima Centauri, red dwarf in Centaurus
Other planets in this systemProxima Centauri c, super Earth or ice giant (unconfirmed)
Proxima Centauri d, Earth-mass planet (sub-Earth)

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