GJ 179

Planetary system · 40.3 light-years away · also HIP 22627

GJ 179 is 40.3 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M3.5 V star; the first was found in 2009 by radial velocity (W. M. Keck Observatory).

Fly there in 3D

Worth knowing

GJ 179 b takes 6.3 years to go round its star once.

The star

Spectral typeM3.5 V
Surface temperature3,370 K
Mass0.357 solar masses
Radius0.38 solar radii
Luminosity0.016 times the Sun
Apparent magnitude11.963
Distance from the Sun40.3 light-years (12.4 parsecs)
Position (J2000)RA 73.0245°, Dec 6.4752°
ConstellationOrion

Planets (1)

PlanetYearOrbitRadiusMassFound
GJ 179 b6.3 years2.410 AU13.8 R⊕ estimated301.94 M⊕Radial Velocity, 2009

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 3,370 K, 0.016 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.13 to 0.26 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 40 years ago, within living memory.

Nearest systems to it

Also found by W. M. Keck Observatory

Sources

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