Exoplanet Catalog
K2-21 b
K2-21 b is a Neptune-like exoplanet that orbits a K-type star. Its mass is 4.04 Earths, it takes 9.3 days to complete one orbit of its star, and is 0.076 AU from its star. Its discovery was announced in 2015.
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PLANET TYPE
Neptune-like
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DISCOVERY DATE
2015
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MASS
4.04 Earths
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PLANET RADIUS
1.84 x Earth
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ORBITAL RADIUS
0.076 AU
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ORBITAL PERIOD
9.3 days
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ECCENTRICITY
0.1
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DETECTION METHOD
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