The HD 5278 system contains 2 exoplanets. It is located 187.82 light years away from the solar system.
| Mass | 1.13 solar masses |
| Radius | 1.19 solar radiae |
| Temperature | 6203 kelvin |
| Stellar Metallicity | -0.12 decimal exponent |
| Age | 3 billion years |
At more than 10 Earth masses, HD 5278 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 | 7.800 Earth masses |
| Density | 2.900 grams per cubic centimeter |
| Radius | 2.450 Earth radiae |
| Semi-major Axis | 0.1202 AU |
| Eccentricity | 0.08 |
| Orbital Period | 14.339 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 | 2021-04 |
| Reference | Sozzetti et al. 2021 |
At more than 10 Earth masses, HD 5278 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 | 18.400 Earth masses |
| Density | 1.120 grams per cubic centimeter |
| Radius | 4.490 Earth radiae |
| Semi-major Axis | 0.2416 AU |
| Eccentricity | 0.07 |
| Orbital Period | 40.870 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Paranal Observatory |
| Discovery Telescope | 8.2 m ESO VLT UT3 Melipal Telescope |
| Discovery Instrument | ESPRESSO |
| Discovery Date | 2021-04 |
| Reference | Sozzetti et al. 2021 |