The HD 28678 system contains 1 exoplanet. It is located 619.40 light years away from the solar system.
| Mass | 1.53 solar masses |
| Radius | 6.48 solar radiae |
| Temperature | 4972 kelvin |
| Stellar Metallicity | -0.11 decimal exponent |
| Age | 1.8 billion years |
At more than 50 Earth masses, HD 28678 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 490.094 Earth masses |
| Density | 1.090 grams per cubic centimeter |
| Radius | 13.500 Earth radiae |
| Semi-major Axis | 1.18 AU |
| Eccentricity | 0.149 |
| Orbital Period | 380.200 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck I Telescope |
| Discovery Instrument | HIRES Spectrometer |
| Discovery Date | 2011-12 |
| Reference | Johnson et al. 2011 |