K2-22

Planetary system · 795.3 light-years away

K2-22 is 795 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M0 V star; the first was found in 2015 by transit (K2).

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Worth knowing

K2-22 b goes round its star every 9.1 hours, 231 times as often as Mercury goes round the Sun.

K2-22 is one of 2 stars in its system. The position of the other star is not catalogued, so only K2-22 and its planets are drawn.

The star

Spectral typeM0 V
Surface temperature3,879 K
Mass0.595292 solar masses
Radius0.58 solar radii
Luminosity0.08426 times the Sun
Apparent magnitude15.565
Distance from the Sun795.3 light-years (243.8 parsecs)
Position (J2000)RA 169.4827°, Dec 2.6190°
ConstellationLeo

Planets (1)

PlanetYearOrbitRadiusMassFound
K2-22 b9.1 hours0.0090 AU2.3 R⊕444.96 M⊕Transit, 2015

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.

Sources

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