archive / atlas record
Proxima Centauri b
A nearby planet in the temperate zone of an active red dwarf.
- classification
- Terrestrial-mass exoplanet
- system
- Proxima Centauri
Proxima Centauri b is known through radial-velocity measurements. Its actual surface conditions and atmosphere are not yet established.
- Class
- Terrestrial-mass exoplanet
- Location / system
- Proxima Centauri
- Distance
- 4.24 light-years from Earth
Only values with an established scientific consensus are listed. Where a quantity is uncertain or model-dependent, it is discussed in the sections below rather than stated as data.
Overview (starter entry, expanded review pending)
Proxima Centauri b is known through radial-velocity measurements. Its actual surface conditions and atmosphere are not yet established.
Radial velocity
Proxima Centauri b is not resolved as a surface. Its listed properties come from changes in host-star light or motion; atmospheric claims, where attempted, depend on instrument sensitivity and retrieval models.
- What remains least constrained about Proxima Centauri b?Composition, internal structure, formation history or local environment can require different observations and may remain model-dependent.
Items above are unresolved. Hypotheses are labelled as such and are not presented as confirmed findings.
NASA/IPAC // verified 28 September 2026