LTT 9779 b
| Discovery | |
|---|---|
| Discovery date | 2020 |
| Transit | |
| Designations | |
| Cuancoá | |
| Orbital characteristics | |
| 0.01679 AU | |
| Eccentricity | <0.01 |
| Inclination | 76.39 ± 0.43° |
| Star | LTT 9779 |
| Physical characteristics | |
Mean radius | 4.72 ± 0.23 R🜨 |
| Mass | 29.32 M🜨 |
| Albedo | 0.8 |
| Temperature | 2,305 K (2,032 °C; 3,689 °F) (Dayside) |
LTT 9779 b, officially named Cuancoá, is a
Characteristics
LTT 9779 b is one of the few known planets in the Neptunian desert.[2] It is highly reflective, with an albedo of 0.8.[3] This makes it the most reflective exoplanet discovered so far. It completes an orbit around LTT 9779 in less than a day, making temperatures on the day side soar to over 2,000 degrees Celsius.[4] Global climate models of the planet indicate it has a very metal-rich atmosphere, with clouds made of silicate likely being present.[1]
Being in the Neptunian desert, LTT 9779 b is a very rare class of planet, with few like it being known. It is estimated that only 1 in 200 Sun-like stars possess a planet with an orbital period of less than a day,
Name
LTT 9779 b was officially named Cuancoá in 2022 by the International Astronomical Union, as part of the NameExoWorlds competition. Cuancoá is a word that refers to the morning star in the Uwa language.[5] Cuancoá's star was named Uúba after the word for "star," "seed," and "eye" in the same language.
See also
- NGTS-4b, another planet in the Neptunian desert
References
- ^ S2CID 259715040.
- ^ S2CID 221883508.
- ^ "Cheops shows scorching exoplanet acts like a mirror". www.esa.int. Retrieved 2023-10-21.
- ISSN 2041-8213.
- ^ "2022 Approved Names". NameExoworlds. Retrieved 2023-10-21.