Wolf 1061 d
Planet· orbits Wolf 1061
Wolf 1061 d - the outermost planet, a cool mini-Neptune (minimum mass ~7.7 Earth) on a wide, eccentric 217-day orbit beyond the habitable zone. RV-only, so its mass is a minimum and its size is a model estimate.
Open in 3D viewSee Wolf 1061 d in the live, interactive 3D map
Key facts
Minimum mass
4.60 × 10²⁵ kg
7.7 M⊕
Year
217 Earth days
Distance from Wolf 1061
0.47 AU
Science
Physical
- Minimum mass (m·sin i)
- 4.60 × 10²⁵ kg · 7.7 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 for a ~7.7-Earth-mass world; no density is quoted.
Orbital
- Semi-major axis
- 0.47 AU
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Eccentricity
- 0.55
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Inclination
- 0.00 °
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Orbital period
- 217.2 days
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Perihelion
- 0.211 AU
- Computed from the orbital elements
- Aphelion
- 0.728 AU
- Computed from the orbital elements
- Mean orbital velocity
- 23.5 km/s
- Computed from the orbital elements
Composition
- Bulk composition
- A cool mini-Neptune of minimum mass ~7.7 Earth on the system's outermost, most eccentric orbit; never imaged.
- Cloud appearance
- Appearance based on ESO/M. Kornmesser's artist's concept. No spacecraft has imaged this world, so its real appearance is unknown — The banded clouds shown are a representation of its class, shown only in Visual mode; Realism shows a plain spectral colour.
Radiation & temperature
- Insolation
- 0.0462 S⊕ · 5% of the sunlight Earth receives
- Computed from Wolf 1061's luminosity and the orbital distance (inverse-square; Earth's sunlight = 1).
- Equilibrium temperature
- 130 K (-143 °C)
- Computed model value for its cool 0.47-AU orbit — not measured.
Discovery & history
- Method
- Radial-velocity detection (stellar wobble)
- Name
- Designated 'd' under the IAU convention that letters a star's planets 'b', 'c', 'd'... in the order they are discovered (the star itself is the unwritten 'a').
The outer planet of the 2015 HARPS discovery, on the most distant and most eccentric orbit of the three.
Images
No official imagery available — this object has never been visited and no officially-licensed depiction exists.