The HD 219828 system contains 2 exoplanets. It is located 238.47 light years away from the solar system.
| Mass | 1.04 solar masses |
| Radius | 1.56 solar radiae |
| Temperature | 5891 kelvin |
| Stellar Metallicity | 0.19 decimal exponent |
| Age | 5.69 billion years |
At more than 10 Earth masses, HD 219828 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 | 18.949 Earth masses |
| Density | 1.090 grams per cubic centimeter |
| Radius | 4.570 Earth radiae |
| Semi-major Axis | 0.048559 AU |
| Eccentricity | 0.09145 |
| Orbital Period | 3.835 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2007-05 |
| Reference | Melo et al. 2007 |
At more than 50 Earth masses, HD 219828 c is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 5406.991 Earth masses |
| Density | 16.400 grams per cubic centimeter |
| Radius | 12.200 Earth radiae |
| Semi-major Axis | 5.657321 AU |
| Eccentricity | 0.810508 |
| Orbital Period | 4789.873 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Multiple Facilities |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2016-07 |
| Reference | Santos et al. 2016 |