The HD 154857 system contains 2 exoplanets. It is located 206.94 light years away from the solar system.
| Mass | 1.96 solar masses |
| Radius | 2.3 solar radiae |
| Temperature | 5589 kelvin |
| Stellar Metallicity | -0.22 decimal exponent |
| Age | 5.64 billion years |
At more than 50 Earth masses, HD 154857 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 778.683 Earth masses |
| Density | 1.820 grams per cubic centimeter |
| Radius | 13.300 Earth radiae |
| Semi-major Axis | 1.29 AU |
| Eccentricity | 0.46 |
| Orbital Period | 408.600 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Anglo-Australian Telescope |
| Discovery Telescope | 3.9 m Anglo-Australian Telescope |
| Discovery Instrument | UCLES Spectrograph |
| Discovery Date | 2004-12 |
| Reference | McCarthy et al. 2004 |
At more than 50 Earth masses, HD 154857 c is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 819.970 Earth masses |
| Density | 1.960 grams per cubic centimeter |
| Radius | 13.200 Earth radiae |
| Semi-major Axis | 5.36 AU |
| Eccentricity | 0.06 |
| Orbital Period | 3452.000 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Anglo-Australian Telescope |
| Discovery Telescope | 3.9 m Anglo-Australian Telescope |
| Discovery Instrument | UCLES Spectrograph |
| Discovery Date | 2014-03 |
| Reference | Wittenmyer et al. 2014 |