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Proper NameNone
DesignationsRoss 128 b, FI Virginis b, Gliese 447 b
ClassificationEarth-mass planet
Orbital Period9 days, 21 hours
Mean Distance from FI Virginis7.4 million km
0.050 AU
Mass1.4 x Earth
Diameter1.6 x Earth
TemperatureNot known
Parent starRoss 128 (FI Virginis), red dwarf star in Virgo
Other planets in this systemNone
NotesA world only slightly larger and more massive than Earth, Ross 128 b follows a very close orbit around its parent star, the cool and faint red dwarf Ross 128 or FI Virginis. The Ross 128 system lies just eleven light years from the Sun, making Ross 128 b the second closest known Earth-mass planet to the Solar System, after Proxima Centauri b.

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