Kepler-211

Planetary system · 1009.0 light-years away

Kepler-211 is 1,009 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 5,123 K star; the first was found in 2014 by transit (Kepler).

Fly there in 3D

Worth knowing

Kepler-211 b goes round its star every 4.14 days, 21 times as often as Mercury goes round the Sun.

The star

Surface temperature5,123 K
Mass0.867 solar masses
Radius0.816 solar radii
Luminosity0.3861 times the Sun
Apparent magnitude13.448
Ageabout 1.55 billion years
Distance from the Sun1009.0 light-years (309.4 parsecs)
Position (J2000)RA 285.4391°, Dec 43.1685°
ConstellationLyra

Planets (2)

PlanetYearOrbitRadiusMassFound
Kepler-211 b4.14 days0.0480 AU1.26 R⊕2.13 M⊕ estimatedTransit, 2014
Kepler-211 c6.04 days0.0620 AU1.29 R⊕18.3 M⊕Transit, 2014

Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.

The planets, compared

For a star of 5,123 K, 0.39 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.61 to 1.10 AU. None of its known planets orbits inside it. The zone says how much starlight arrives, not whether a planet has water or air. The edges follow Kopparapu et al. (2014), as the 3D view draws them.

The light you see left 1,009 years ago, around 1020.

Nearest systems to it

Also found by Kepler

Sources

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