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Kepler-1971 b

KOI-KOI-4777.01, KOI-KOI-4777 b, KIC 6592335.01, KIC 6592335 b

Extrasolar Planet in Lyra

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Proper Name	None
Designations	Kepler-1971 b, KOI-KOI-4777.01, KOI-KOI-4777 b, KIC 6592335.01, KIC 6592335 b
Classification	Earth-mass planet
Orbital Period	9 hours, 53 minutes
Mean Distance from Kepler-1971	1.2 million km 0.008 AU
Mass	< 0.34 x Earth*
Diameter	0.51 x Earth
Temperature	Not known
Parent star	Kepler-1971, red dwarf star in Lyra
Other planets in this system	None

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* Many sources quote a minimal mass for this planet of < 0.31 x Jupiter. Given that the planet is one of the smallest so far discovered (comparable in diameter to Mars), such a mass would make it preposterously dense (approaching two hundred times the density of Earth). The mass value given here is based on analyses that constrain the planet's density to a more realistic level.

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