GJ 676 A

Planetary system · 52.3 light-years away · also HIP 85647

GJ 676 A is 52.3 light-years from the Sun. The NASA Exoplanet Archive lists 4 planets around this M0 star; the first was found in 2010 by radial velocity (La Silla Observatory).

Fly there in 3D

Worth knowing

GJ 676 A d goes round its star every 3.60 days, 24 times as often as Mercury goes round the Sun.

GJ 676 A is one of 2 stars in its system: the other is drawn where the Washington Double Star Catalog measures it on the sky.

The star

Spectral typeM0
Surface temperature3,734 K
Mass0.626 solar masses
Radius0.69 solar radii
Luminosity0.09068 times the Sun
Apparent magnitude9.58
Distance from the Sun52.3 light-years (16.0 parsecs)
Position (J2000)RA 262.5449°, Dec -51.6378°
ConstellationAra

The other star

GJ 676 B is a M3V star of magnitude 13.37, judged a true companion. In 2016 it was 47.6″ from GJ 676 A, at position angle 101° (Washington Double Star Catalog, 17302-5138 LDS 599): 763 AU on the sky at this distance. The true distance can only be larger.

Planets (4)

PlanetYearOrbitRadiusMassFound
GJ 676 A d3.60 days0.0390 AU1.78 R⊕ estimated3.8139 M⊕ minimumRadial Velocity, 2012
GJ 676 A e35.5 days0.181 AU2.47 R⊕ estimated6.6744 M⊕ minimumRadial Velocity, 2012
GJ 676 A b2.9 years1.735 AU12.8 R⊕ estimated1840.9 M⊕Radial Velocity, 2010
GJ 676 A c38.1 years9.726 AU12.3 R⊕ estimated4288.1 M⊕Radial Velocity, 2016

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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