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Radial velocity · 2012

GJ 676 A e

This world receives 2.77× the starlight Earth does; a year lasts 35.5 days; the light you see left it 52 years ago.

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Size
2.5 × Earthestimated
A year
35.5 days0.181 AU
Temperature
78 °C352 K

About this world

GJ 676 A e is a sub-Neptune orbiting GJ 676 A, a cool red dwarf (type M0) 52.3 light-years from Earth. It is about 2.5 times the size of Earth (its size estimated from its mass), with at least 6.7 Earth masses (a minimum, measured by radial velocity). It completes an orbit every 35.5 days at 0.18 AU from its star, closer than Mercury is to the Sun.

Its equilibrium temperature is about 352 K (78 °C): too cold for liquid water on its surface. At its size it almost certainly keeps a deep envelope of hydrogen and helium.

It was discovered in 2012 by radial velocity with La Silla Observatory. The star wobbles toward and away from us, Doppler-shifting its spectrum. GJ 676 A has 4 known planets; the others are GJ 676 A d, GJ 676 A b and GJ 676 A c.

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