Teegarden's Star b
Planet· orbits Teegarden's Star
Teegarden's Star b - a temperate planet (minimum mass ~1.1 Earth) on a 4.9-day orbit; one of the most Earth-like worlds by mass and temperature yet found. Never imaged.
Open in 3D viewSee Teegarden's Star b in the live, interactive 3D map
Key facts
Minimum mass
6.93 × 10²⁴ kg
1.16 M⊕
Year
4.91 Earth days
Distance from Teegarden's Star
3,874,585 km
Science
Physical
- Minimum mass (m·sin i)
- 6.93 × 10²⁴ kg · 1.16 M⊕
- Radial-velocity detection measures m·sin i; the true mass depends on the unknown orbital inclination.
- Radius
- Not measured
- No transit — radius is a model estimate; true size unknown.
Orbital
- Semi-major axis
- 3,874,585 km
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Eccentricity
- 0.03
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Inclination
- 0.00 °
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Orbital period
- 4.9 days
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Perihelion
- 3,758,347 km
- Computed from the orbital elements
- Aphelion
- 3,990,822 km
- Computed from the orbital elements
- Mean orbital velocity
- 57.4 km/s
- Computed from the orbital elements
Composition
- Bulk composition
- Presumed rocky (minimum mass ~1.2 Earth), in the habitable zone; never imaged.
- Surface appearance
- Appearance based on ESO/M. Kornmesser's artist's concept. No spacecraft has imaged this world, so its real appearance is unknown — The surface shown is an artistic representation, shown only in Visual mode; Realism shows a plain spectral colour.
Radiation & temperature
- Insolation
- 1.09 S⊕ · 1.09× the sunlight Earth receives
- Computed from Teegarden's Star's luminosity and the orbital distance (inverse-square; Earth's sunlight = 1).
- Equilibrium temperature
- 277 K (4 °C)
- Computed model value — near Earth's, but not measured.
Discovery & history
- Method
- Radial-velocity detection (stellar wobble)
- Name
- Designated 'b' as the first planet found around its star, following the IAU convention of lettering planets in discovery order from 'b'.
One of two planets announced in 2019 from CARMENES radial velocities - the inner, and among the highest-rated for potential habitability.
Images
No official imagery available — this object has never been visited and no officially-licensed depiction exists.