Kepler-22

Planetary system · 634.8 light-years away

Kepler-22 is 635 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this G5 V star; the first was found in 2011 by transit (Kepler).

Fly there in 3D

Worth knowing

Kepler-22 b takes 289.9 days to go round its star once.

The star

Spectral typeG5 V
Surface temperature5,596 K
Mass0.857 solar masses
Radius0.869 solar radii
Luminosity0.6453 times the Sun
Apparent magnitude11.751
Ageabout 7 billion years
Distance from the Sun634.8 light-years (194.6 parsecs)
Position (J2000)RA 289.2172°, Dec 47.8841°
ConstellationCygnus

Planets (1)

PlanetYearOrbitRadiusMassFound
Kepler-22 b289.9 days0.812 AU2.1 R⊕9.1 M⊕Transit, 2011

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 5,596 K, 0.65 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.77 to 1.37 AU. Its one known planet 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 635 years ago, around 1390.

Nearest systems to it

Also found by Kepler

Sources

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