LTT 9779 b
| Discovery | |
|---|---|
| Discovered by | Jenkins et al. |
| Discovery site | Transiting Exoplanet Survey Satellite |
| Discovery date | 2020 |
| Transit | |
| Designations | |
| Cuancoá, TOI-193 b | |
| Orbital characteristics | |
| 0.01734+0.00136 −0.00160 AU | |
| Eccentricity | <0.01 |
| 0.79206418(12) days | |
| Inclination | 76.55°+1.27° −1.75° |
| Star | LTT 9779 |
| Physical characteristics | |
| 4.501+0.135 −0.157 R🜨 | |
| Mass | 29.65+0.78 −0.77 M🜨 |
| Albedo | 0.73±0.11 |
| Temperature | Dayside: 2,260+40 −50 K Nightside: 1,330 K |
LTT 9779 b, officially named Cuancoá, is a Neptune-sized planet orbiting the sunlike star LTT 9779, or Uúba. As of 2023, it has the highest-known albedo of any planet. It was discovered in 2020 using data from the Transiting Exoplanet Survey Satellite (TESS), and is also called TOI-193 b.