GJ 414 A

Planetary system · 38.8 light-years away · also HD 97101, HIP 54646

GJ 414 A is 38.8 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this K7 V star; the first was found in 2021 by radial velocity (W. M. Keck Observatory).

Fly there in 3D

Worth knowing

GJ 414 A b goes round its star every 50.8 days, 1.7 times as often as Mercury goes round the Sun.

GJ 414 A is one of 2 stars in its system. The position of the other star is not catalogued, so only GJ 414 A and its planets are drawn.

The star

Spectral typeK7 V
Surface temperature4,120 K
Mass0.65 solar masses
Radius0.68 solar radii
Luminosity0.119 times the Sun
Apparent magnitude8.31
Ageabout 12.4 billion years
Distance from the Sun38.8 light-years (11.9 parsecs)
Position (J2000)RA 167.7745°, Dec 30.4452°
ConstellationUrsa Major

Planets (2)

PlanetYearOrbitRadiusMassFound
GJ 414 A b50.8 days0.232 AU2.63 R⊕7.6 M⊕ minimumRadial Velocity, 2021
GJ 414 A c749.8 days1.400 AU8.4 R⊕53.83 M⊕ minimumRadial Velocity, 2021

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 4,120 K, 0.12 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.35 to 0.67 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 39 years ago, within living memory.

Nearest systems to it

Also found by W. M. Keck Observatory

Sources

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