The YZ Cet system contains 3 exoplanets. It is located 12.11 light years away from the solar system.
| Mass | 0.14 solar masses |
| Radius | 0.16 solar radiae |
| Temperature | 3151 kelvin |
| Stellar Metallicity | -0.18 decimal exponent |
| Age | 3.8 billion years |
At less than 1.5 Earth masses, YZ Cet b is a terrestrial planet, much like the terrestrial planets we find in our solar system, namely Mercury, Venus, Earth and Mars.
| Mass | 0.700 Earth masses |
| Density | 5.050 grams per cubic centimeter |
| Radius | 0.913 Earth radiae |
| Semi-major Axis | 0.01634 AU |
| Eccentricity | 0.06 |
| Orbital Period | 2.021 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2017-09 |
| Reference | Astudillo-Defru et al. 2017 |
At less than 1.5 Earth masses, YZ Cet c is a terrestrial planet, much like the terrestrial planets we find in our solar system, namely Mercury, Venus, Earth and Mars.
| Mass | 1.140 Earth masses |
| Density | 5.410 grams per cubic centimeter |
| Radius | 1.050 Earth radiae |
| Semi-major Axis | 0.02156 AU |
| Eccentricity | 0 |
| Orbital Period | 3.060 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2017-09 |
| Reference | Astudillo-Defru et al. 2017 |
At less than 1.5 Earth masses, YZ Cet d is a terrestrial planet, much like the terrestrial planets we find in our solar system, namely Mercury, Venus, Earth and Mars.
| Mass | 1.090 Earth masses |
| Density | 5.480 grams per cubic centimeter |
| Radius | 1.030 Earth radiae |
| Semi-major Axis | 0.02851 AU |
| Eccentricity | 0.07 |
| Orbital Period | 4.656 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2017-09 |
| Reference | Astudillo-Defru et al. 2017 |