The GJ 3473 system contains 2 exoplanets. It is located 89.25 light years away from the solar system.
| Mass | 0.36 solar masses |
| Radius | 0.36 solar radiae |
| Temperature | 3347 kelvin |
| Stellar Metallicity | 0.11 decimal exponent |
| Age | - billion years |
At 1.860 Earth masses, GJ 3473 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 | 1.860 Earth masses |
| Density | 5.030 grams per cubic centimeter |
| Radius | 1.264 Earth radiae |
| Semi-major Axis | 0.01589 AU |
| Eccentricity | 0 |
| Orbital Period | 1.198 days |
| Discovery Method | Transit |
| Discovery Facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery Telescope | 0.1 m TESS Telescope |
| Discovery Instrument | TESS CCD Array |
| Discovery Date | 2020-10 |
| Reference | Kemmer et al. 2020 |
At more than 10 Earth masses, GJ 3473 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 | 7.410 Earth masses |
| Density | 2.240 grams per cubic centimeter |
| Radius | 2.630 Earth radiae |
| Semi-major Axis | 0.0876 AU |
| Eccentricity | 0 |
| Orbital Period | 15.509 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Multiple Observatories |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2020-10 |
| Reference | Kemmer et al. 2020 |