Back قنطورس الأقرب d Arabic Proxima Centauri d Catalan Próxima 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 | February 2022 |
| Radial velocity | |
| Orbital characteristics[2] | |
| 0.02881±0.00017 AU | |
| Eccentricity | 0 (assumed) |
| 5.12338±0.00035 d | |
| Semi-amplitude | 0.392±0.057 m/s |
| Star | Proxima Centauri |
| Physical characteristics | |
| ~0.81±0.08 R🜨[1] (predicted) | |
| Mass | ≥0.260±0.038 M🜨[2] |
| Temperature | 360 K (87 °C; 188 °F)[1] |
Proxima Centauri d (also called Proxima d) is a confirmed[2] 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 one or 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.[4] This signal was formally proposed to be a candidate exoplanet by Faria et al. in a follow-up paper published in February 2022,[1] and was independently confirmed in 2025.[2]
- ^ a b c d Cite error: The named reference
Faria2022was invoked but never defined (see the help page). - ^ a b c d Cite error: The named reference
SuárezMascareño2025was invoked but never defined (see the help page). - ^ Cite error: The named reference
Artigau2022was invoked but never defined (see the help page). - ^ Cite error: The named reference
SuarezMascareno2020was invoked but never defined (see the help page).
Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).