The GJ 876 system contains 4 exoplanets. It is located 15.25 light years away from the solar system.
| Mass | 0.32 solar masses |
| Radius | 0.3 solar radiae |
| Temperature | 3293.74 kelvin |
| Stellar Metallicity | 0.213 decimal exponent |
| Age | 1 billion years |
At more than 50 Earth masses, GJ 876 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 723.223 Earth masses |
| Density | 1.690 grams per cubic centimeter |
| Radius | 13.300 Earth radiae |
| Semi-major Axis | 0.208317 AU |
| Eccentricity | 0.0324 |
| Orbital Period | 61.117 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Multiple Observatories |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 1998-10 |
| Reference | Marcy et al. 1998 |
At more than 50 Earth masses, GJ 876 c is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 226.985 Earth masses |
| Density | 0.455 grams per cubic centimeter |
| Radius | 14.000 Earth radiae |
| Semi-major Axis | 0.12959 AU |
| Eccentricity | 0.25591 |
| Orbital Period | 30.088 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Multiple Observatories |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2001-07 |
| Reference | Marcy et al. 2001 |
At more than 10 Earth masses, GJ 876 d 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 | 6.830 Earth masses |
| Density | 2.370 grams per cubic centimeter |
| Radius | 2.510 Earth radiae |
| Semi-major Axis | 0.020807 AU |
| Eccentricity | 0.207 |
| Orbital Period | 1.938 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck I Telescope |
| Discovery Instrument | HIRES Spectrometer |
| Discovery Date | 2005-11 |
| Reference | Rivera et al. 2005 |
At more than 10 Earth masses, GJ 876 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 | 14.600 Earth masses |
| Density | 1.330 grams per cubic centimeter |
| Radius | 3.920 Earth radiae |
| Semi-major Axis | 0.3343 AU |
| Eccentricity | 0.055 |
| Orbital Period | 124.260 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck I Telescope |
| Discovery Instrument | HIRES Spectrometer |
| Discovery Date | 2010-08 |
| Reference | Rivera et al. 2010 |