| 词条 | Kepler-20b |
| 释义 |
| name = Kepler-20b | discoverer = Kepler team | discovered = 20 December 2011 | discovery_method = Transit (Kepler Mission) | apsis = astron | semimajor = {{val|0.04537}} AU | eccentricity = <0.32 | period = {{val|3.6961219}} d | inclination = {{val|86.50|+0.36|-0.31}} | star P = Kepler-20 (KOI-070) | mean_radius = {{val|1.868|+0.066|-0.034}} {{Earth radius|link=y}} | mass = {{val|9.7|+1.41|-1.44}} [1] {{Earth mass|link=y}} | density = {{val|8.2|+2.0|-2.7}} g cm−3 | single_temperature = {{val|1014}} }} Kepler-20b is an exoplanet orbiting Kepler-20. It is classified as a Super-Earth, as it has a radius and mass greater than that of Earth. At about 1.87 {{Earth radius}}, it would most likely be a Mini-Neptune, but its high mass of 9.7 {{Earth mass}} implies that it is an iron-rich rocky world. Along with the other four planets in the system, Kepler-20b was announced on 20 December 2011. References1. ^https://arxiv.org/abs/1608.06836 A 1.9 Earth radius rocky planet and the discovery of a non-transiting planet in the Kepler-20 system {{Extrasolar-planet-stub}} 5 : Exoplanets discovered in 2011|Kepler-20|Transiting exoplanets|Exoplanets discovered by Kepler (spacecraft)|Super-Earths |
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