GJ 422

Planetary system · 41.3 light-years away · also HD 304043, HIP 55042

GJ 422 is 41.3 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M3.5 V star; the first was found in 2014 by radial velocity (Multiple Observatories).

Fly there in 3D

Worth knowing

GJ 422 b goes round its star every 20.1 days, 4 times as often as Mercury goes round the Sun.

The star

Spectral typeM3.5 V
Surface temperature3,323 K
Mass0.35 solar masses
Radius0.370328 solar radii
Luminosity0.011 times the Sun
Apparent magnitude11.66
Distance from the Sun41.3 light-years (12.7 parsecs)
Position (J2000)RA 168.9810°, Dec -57.5426°
ConstellationCarina

Planets (1)

PlanetYearOrbitRadiusMassFound
GJ 422 b20.1 days0.111 AU3.33 R⊕ estimated11.07 M⊕ minimumRadial Velocity, 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.

Sources

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