The TOI-561 system contains 5 exoplanets. It is located 279.84 light years away from the solar system.
| Mass | 0.79 solar masses |
| Radius | 0.85 solar radiae |
| Temperature | 5455 kelvin |
| Stellar Metallicity | -0.33 decimal exponent |
| Age | 5 billion years |
With a mass below 5 Earth masses, a density of 3, and a semi-major axis of 0.01055 astronomical units, TOI-561 b could, potentially, be an ocean world - a planet with no dry land.
| Mass | 1.590 Earth masses |
| Density | 3.000 grams per cubic centimeter |
| Radius | 1.423 Earth radiae |
| Semi-major Axis | 0.01055 AU |
| Eccentricity | 0 |
| Orbital Period | 0.447 days |
| Discovery Method | Transit |
| Discovery Facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery Telescope | 0.1 m TESS Telescope |
| Discovery Instrument | TESS CCD Array |
| Discovery Date | 2020-12 |
| Reference | Lacedelli et al. 2020 |
At more than 10 Earth masses, TOI-561 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 | 5.400 Earth masses |
| Density | 1.300 grams per cubic centimeter |
| Radius | 2.878 Earth radiae |
| Semi-major Axis | 0.08809 AU |
| Eccentricity | 0.06 |
| Orbital Period | 10.779 days |
| Discovery Method | Transit |
| Discovery Facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery Telescope | 0.1 m TESS Telescope |
| Discovery Instrument | TESS CCD Array |
| Discovery Date | 2020-12 |
| Reference | Lacedelli et al. 2020 |
At more than 10 Earth masses, TOI-561 d 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 | 11.950 Earth masses |
| Density | 4.100 grams per cubic centimeter |
| Radius | 2.530 Earth radiae |
| Semi-major Axis | 0.1569 AU |
| Eccentricity | 0.051 |
| Orbital Period | 25.620 days |
| Discovery Method | Transit |
| Discovery Facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery Telescope | 0.1 m TESS Telescope |
| Discovery Instrument | TESS CCD Array |
| Discovery Date | 2020-12 |
| Reference | Lacedelli et al. 2020 |
At more than 10 Earth masses, TOI-561 e 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 | 16.000 Earth masses |
| Density | 4.600 grams per cubic centimeter |
| Radius | 2.670 Earth radiae |
| Semi-major Axis | 0.3274 AU |
| Eccentricity | 0.061 |
| Orbital Period | 77.230 days |
| Discovery Method | Transit |
| Discovery Facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery Telescope | 0.1 m TESS Telescope |
| Discovery Instrument | TESS CCD Array |
| Discovery Date | 2020-12 |
| Reference | Lacedelli et al. 2020 |
With a mass below 5 Earth masses, a density of 1.3, and a semi-major axis of 0.1174 astronomical units, TOI-561 f could, potentially, be an ocean world - a planet with no dry land.
| Mass | 3.000 Earth masses |
| Density | 1.300 grams per cubic centimeter |
| Radius | 2.320 Earth radiae |
| Semi-major Axis | 0.1174 AU |
| Eccentricity | 0 |
| Orbital Period | 16.287 days |
| Discovery Method | Transit |
| Discovery Facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery Telescope | 0.1 m TESS Telescope |
| Discovery Instrument | TESS CCD Array |
| Discovery Date | 2021-02 |
| Reference | Weiss et al. 2021 |