Back قنطورس الأقرب d Arabic Proxima Centauri d Catalan Proxima Centauri d Spanish Proxima Centauri d Estonian پروکسیما قنطورس دی Persian Proxima Centauri d French פרוקסימה קנטאורי d HE Proxima Centauri d ID Proxima Centauri d Italian プロキシマ・ケンタウリd Japanese
.jpg) Artistic depiction of Proxima Centauri d, with Proxima Centauri and Alpha Centauri A & B visible in the background | |
| Discovery[1] | |
|---|---|
| Discovery site | VLT-ESPRESSO |
| Discovery date | 2020 |
| Radial velocity | |
| Orbital characteristics[1] | |
| 0.02885+0.00019 −0.00022 AU | |
| Eccentricity | 0.04+0.15 −0.04 |
| 5.122+0.002 −0.0036 d | |
| Semi-amplitude | 0.39±0.07 m/s |
| Star | Proxima Centauri |
| Physical characteristics[1] | |
| ~0.81±0.08 R🜨 | |
| Mass | ≥0.26±0.05 M🜨 |
| Temperature | 360 K (87 °C; 188 °F) |
Proxima Centauri d (also called Proxima d) is a candidate[2][1] exoplanet orbiting the red dwarf star Proxima Centauri, the closest star to the Sun and part of the Alpha Centauri triple star system. Together with two other planets[a] in the Proxima Centauri system, it is the closest known exoplanet to the Solar System, located approximately 4.2 light-years (1.3 parsecs; 40 trillion kilometres; 25 trillion miles) away in the constellation of Centaurus. The first signs of the exoplanet emerged as a weak 5.15-day signal in radial velocity data taken from the Very Large Telescope during a 2020 study on Proxima b's mass. This signal was formally proposed to be a candidate exoplanet by Faria et al. in a follow-up paper published in February 2022.[4][1]
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