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Proper Name	None
Designations	Struve 2398 B b, STF 2398 B b, Gliese 725 B b, HD 173740 b, LHS 59 b
Classification	Earth-mass planet (provisional)
Orbital Period	2 days, 17 hours
Mean Distance from Struve 2398	Not known
Mass	1.20 x Earth
Diameter	Not known
Temperature	Not known
Parent star	Struve 2398 B (Gliese 725 B), red dwarf in Draco
Other planets in this system	Struve 2398 B c, super Earth (unconfirmed)

The Struve 2398 system consists of a binary pair of red dwarfs just 11.5 light years from the Sun. The two stars orbit one another over a period of 871 years, and Struve 2398 B is currently the southern of the two stars as seen from Earth. The proposed exoplanet Struve 2398 B b orbits this star in turn, though its existence has yet to be conclusively demonstrated. Imagery provided by Aladin sky atlas

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