The HD 153557 system contains 3 exoplanets. It is located 58.52 light years away from the solar system.
| Mass | 0.79 solar masses |
| Radius | 0.75 solar radiae |
| Temperature | 4837 kelvin |
| Stellar Metallicity | - decimal exponent |
| Age | - billion years |
At more than 10 Earth masses, HD 153557 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 | 20.059 Earth masses |
| Density | 1.040 grams per cubic centimeter |
| Radius | 4.730 Earth radiae |
| Semi-major Axis | 0.068049 AU |
| Eccentricity | 0.065355 |
| Orbital Period | 7.299 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Multiple Observatories |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2022-09 |
| Reference | Feng et al. 2022 |
At more than 10 Earth masses, HD 153557 c 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 | 17.308 Earth masses |
| Density | 1.170 grams per cubic centimeter |
| Radius | 4.330 Earth radiae |
| Semi-major Axis | 0.111312 AU |
| Eccentricity | 0.511322 |
| Orbital Period | 15.270 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Multiple Observatories |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2022-09 |
| Reference | Feng et al. 2022 |
At more than 50 Earth masses, HD 153557 d is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 8680.481 Earth masses |
| Density | 28.300 grams per cubic centimeter |
| Radius | 11.900 Earth radiae |
| Semi-major Axis | 21.349779 AU |
| Eccentricity | 0.151517 |
| Orbital Period | 40654.648 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Multiple Observatories |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2022-09 |
| Reference | Feng et al. 2022 |