The GJ 676 A system contains 4 exoplanets. It is located 52.27 light years away from the solar system.
| Mass | 0.63 solar masses |
| Radius | 0.69 solar radiae |
| Temperature | 3734 kelvin |
| Stellar Metallicity | 0.23 decimal exponent |
| Age | - billion years |
At more than 50 Earth masses, GJ 676 A b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 1837.011 Earth masses |
| Density | 4.810 grams per cubic centimeter |
| Radius | 12.800 Earth radiae |
| Semi-major Axis | 1.734535 AU |
| Eccentricity | 0.318615 |
| Orbital Period | 1051.445 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2011-02 |
| Reference | Forveille et al. 2011 |
At more than 50 Earth masses, GJ 676 A c is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 4271.010 Earth masses |
| Density | 12.600 grams per cubic centimeter |
| Radius | 12.300 Earth radiae |
| Semi-major Axis | 9.67808 AU |
| Eccentricity | 0.295316 |
| Orbital Period | 13921.423 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Paranal Observatory |
| Discovery Telescope | Very Large Telescope (Antu) |
| Discovery Instrument | FORS2 |
| Discovery Date | 2016-11 |
| Reference | Sahlmann et al. 2016 |
At 3.800 Earth masses, GJ 676 A d is a so called Super Earth. Super Earths could be terrestrial worlds like Earth, but they could also be ocean worlds or terrestrial worlds wrapped in a substantial atmosphere, in which case some refer to them as Mini Neptunes.
| Mass | 3.798 Earth masses |
| Density | 3.760 grams per cubic centimeter |
| Radius | 1.770 Earth radiae |
| Semi-major Axis | 0.039322 AU |
| Eccentricity | 0.192193 |
| Orbital Period | 3.601 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2012-12 |
| Reference | Anglada-Escude & Tuomi 2012 |
At more than 10 Earth masses, GJ 676 A e is an ice giant, a planet that is made up mostly of volatiles like water, amonia and methane, and enveloped by a dense hydrogen and helium atmosphere, much like Uranus and Neptune.
| Mass | 6.692 Earth masses |
| Density | 2.410 grams per cubic centimeter |
| Radius | 2.480 Earth radiae |
| Semi-major Axis | 0.180707 AU |
| Eccentricity | 0.152395 |
| Orbital Period | 35.474 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2012-12 |
| Reference | Anglada-Escude & Tuomi 2012 |