The HD 121504 system contains 1 exoplanet. It is located 135.87 light years away from the solar system.
| Mass | 1.62 solar masses |
| Radius | 1.07 solar radiae |
| Temperature | 6027 kelvin |
| Stellar Metallicity | 0.15 decimal exponent |
| Age | 1.2 billion years |
At more than 50 Earth masses, HD 121504 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 479.923 Earth masses |
| Density | 1.050 grams per cubic centimeter |
| Radius | 13.600 Earth radiae |
| Semi-major Axis | 0.33 AU |
| Eccentricity | 0.03 |
| Orbital Period | 63.330 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 1.2 m Leonhard Euler Telescope |
| Discovery Instrument | CORALIE Spectrograph |
| Discovery Date | 2004-02 |
| Reference | Mayor et al. 2004 |