K2-222

Planetary system · 330.5 light-years away · also TYC 615-587-1

K2-222 is 330 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this G0 star; the first was found in 2018 by transit (K2).

Fly there in 3D

Worth knowing

K2-222 b goes round its star every 15.4 days, 6 times as often as Mercury goes round the Sun.

The star

Spectral typeG0
Surface temperature5,942 K
Mass0.94 solar masses
Radius1.072 solar radii
Luminosity1.34 times the Sun
Apparent magnitude9.543
Ageabout 7.1 billion years
Distance from the Sun330.5 light-years (101.3 parsecs)
Position (J2000)RA 16.4625°, Dec 11.7537°
ConstellationPisces

Planets (1)

PlanetYearOrbitRadiusMassFound
K2-222 b15.4 days0.119 AU2.275 R⊕7.5 M⊕Transit, 2018

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 5,942 K, 1.3 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.09 to 1.91 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 330 years ago, around 1700.

Nearest systems to it

Also found by K2

Sources

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