Teegarden's Star b
Teegarden's Star b (also known as Teegarden b) is an exoplanet found orbiting within the habitable zone of Teegarden's Star, an M-type red dwarf 12.5 light years away from the Solar System. It had the highest Earth Similarity Index (ESI) of any exoplanet,: 106 but in February 2024 a new study updated the parameters of the planet, thus reducing its ESI to 0.90, making it no longer the planet with the hightest ESI. Along with Teegarden's Star c, it is among the closest known potentially habitable exoplanets.
Artist’s impression of Teegarden’s Star b | |
| Discovery | |
|---|---|
| Discovered by | Zechmeister et al. |
| Discovery site | Calar Alto Observatory |
| Discovery date | June 2019 |
| Orbital characteristics | |
| 0.0252+0.0008 −0.0009 AU | |
| Eccentricity | 0+0.16 −0 |
| 4.91±0.0014 d | |
| Star | Teegarden's Star |
| Physical characteristics | |
| Mass | ≥ 1.05+0.13 −0.12 ME |
| Temperature | 301 K (28 °C) |
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