TOI-561 b
| Discovery | |
|---|---|
| Discovered by | Transiting Exoplanet Survey Satellite |
| Discovery date | 2020 |
| Transit | |
| Orbital characteristics | |
| 0.0106 AU | |
| 0.4 d | |
| Star | TOI-561 |
| Physical characteristics | |
| 1.425 R🜨 | |
| Mass | 2 M🜨 |
| Temperature | <3000 K (dayside) |
TOI-561 b is an ultra-short period super-Earth with a radius of roughly 1.4 Earths. It has an extremely short orbital period of under 11 hours, less than half of an Earth day, resulting in an equilibrium temperature of 2,480 ± 200 K (2,207 ± 200 °C; 4,004 ± 360 °F). The planet was shown to have an atmosphere in a 2025 study.