The HD 191939 system is known to contain 3 exoplanets in orbit around it. It is located 174.85 light years away from the solar system.
| Mass | 0.92 solar masses |
| Radius | 0.94 solar radiae |
| Temperature | 5427 kelvin |
| Stellar Metallicity | -0.16 Decimal exponent |
| Age | 7 billion years |
At more than 10 Earth masses, HD 191939 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 | 11.600 Earth masses |
| Density | 1.590 grams per cubic centimeter |
| Radius | 3.420 Earth radiae |
| Semi-major Axis | 0.0814 AU |
| Eccentricity | NaN |
| Orbital Period | 8.880 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 | 2020-02 |
| Reference | Badenas-Agusti et al. 2020 |
At more than 10 Earth masses, HD 191939 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 | 10.500 Earth masses |
| Density | 1.710 grams per cubic centimeter |
| Radius | 3.230 Earth radiae |
| Semi-major Axis | 0.1762 AU |
| Eccentricity | NaN |
| Orbital Period | 28.581 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 | 2020-02 |
| Reference | Badenas-Agusti et al. 2020 |
At more than 10 Earth masses, HD 191939 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 | 10.100 Earth masses |
| Density | 1.760 grams per cubic centimeter |
| Radius | 3.160 Earth radiae |
| Semi-major Axis | 0.215 AU |
| Eccentricity | NaN |
| Orbital Period | 38.356 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 | 2020-02 |
| Reference | Badenas-Agusti et al. 2020 |