The GJ 15 A system contains 2 exoplanets. It is located 11.62 light years away from the solar system.
| Mass | 0.38 solar masses |
| Radius | 0.38 solar radiae |
| Temperature | 3607 kelvin |
| Stellar Metallicity | -0.34 decimal exponent |
| Age | - billion years |
At 3.031 Earth masses, GJ 15 A b 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 | 3.030 Earth masses |
| Density | 4.470 grams per cubic centimeter |
| Radius | 1.550 Earth radiae |
| Semi-major Axis | 0.072 AU |
| Eccentricity | 0.094 |
| Orbital Period | 11.441 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck I Telescope |
| Discovery Instrument | HIRES Spectrometer |
| Discovery Date | 2014-10 |
| Reference | Howard et al. 2014 |
At more than 10 Earth masses, GJ 15 A c 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 | 36.000 Earth masses |
| Density | 0.667 grams per cubic centimeter |
| Radius | 6.670 Earth radiae |
| Semi-major Axis | 5.4 AU |
| Eccentricity | 0.27 |
| Orbital Period | 7600.000 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Roque de los Muchachos Observatory |
| Discovery Telescope | 3.58 m Telescopio Nazionale Galileo |
| Discovery Instrument | HARPS-N Spectrograph |
| Discovery Date | 2018-09 |
| Reference | Pinamonti et al. 2018 |