The K2-84 system contains 2 exoplanets. It is located 929.14 light years away from the solar system.
| Mass | 0.95 solar masses |
| Radius | 0.93 solar radiae |
| Temperature | 5652 kelvin |
| Stellar Metallicity | 0.278 decimal exponent |
| Age | - billion years |
At more than 10 Earth masses, K2-84 b 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 | 6.390 Earth masses |
| Density | 2.510 grams per cubic centimeter |
| Radius | 2.410 Earth radiae |
| Semi-major Axis | 0.0665 AU |
| Eccentricity | NaN |
| Orbital Period | 6.421 days |
| Discovery Method | Transit |
| Discovery Facility | K2 |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2016-09 |
| Reference | Crossfield et al. 2016 |
With a mass below 5 Earth masses, a density of 3.14, and a semi-major axis of 0.1768 astronomical units, K2-84 c could, potentially, be an ocean world - a planet with no dry land.
| Mass | 4.780 Earth masses |
| Density | 3.140 grams per cubic centimeter |
| Radius | 2.030 Earth radiae |
| Semi-major Axis | 0.1768 AU |
| Eccentricity | NaN |
| Orbital Period | 27.860 days |
| Discovery Method | Transit |
| Discovery Facility | K2 |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2016-09 |
| Reference | Crossfield et al. 2016 |