Key parameters at a glance
- A radius of 1.21 Earth radii
- A mass of 1.91 Earth masses
- Surface gravity around 1.30 g
- An orbital period of 4.887 days
- Semi-major axis 0.0375 AU
- Distance from Earth 14.04 light-years
- Earth Similarity Index 0.942
- Travel time at Voyager 1 speed 247,666 years
- Almost certainly tidally locked to its host star given the close orbit
Context from the literature
Wolf 1061b is an exoplanet orbiting the red dwarf star Wolf 1061 in the Ophiuchus constellation, about 13.8 light years from Earth. It is the first planet in order from its host star in a triple planetary system, and has an orbital period of nearly 5 days. The planet orbits too close to its star for it to be in the habitable zone.
Excerpted from Wikipedia · full article
2 siblings around Wolf 1061
Wolf 1061 b shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Wolf 1061 b this | Rocky Terrestrial | 1.21 | 1.91 | 4.887 | — | 2015 |
| Wolf 1061 c | Super-Earth | 1.66 | 3.41 | 17.872 | — | 2015 |
| Wolf 1061 d | Sub-Neptune | 2.69 | 7.70 | 217.210 | — | 2015 |
Wolf 1061 b Planet Profile
Physical Specs
Classification
Planet Type
Rocky Terrestrial
Discovery
Size rank in cohort
Rank by radius
#56of 570
top 9.6%
This planet
1.21R⊕
Rocky Terrestrial median
1.01R⊕
Nearest-size peers
| Metric | Earth | Wolf 1061 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.21 | 11.21 |
| Mass (M⊕) | 1.00 | 1.91 | 317.83 |
| Density (g/cm³) | 5.51 | 5.92 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.30 | 2.53 |
| Insolation (S⊕) | 1.00 | 7.34 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 1.910 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HIP
HIP 80824
TIC
TIC 413948621
Gaia DR2
Gaia DR2 4330690742322011520
Gaia DR3
Gaia DR3 4330690742322011520
System
Wolf 1061
Percentile among Rocky Terrestrial cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.89 Earth days (1.3% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0375 AU.
Eq. Temperature
—
Insolation (S⊕)
7.34
Earth = 1.00
Earth Similarity (ESI)
0.942
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water). Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Wright et al. 2016Instrument
HARPS Spectrograph
Publication
2016-02
Observation locale
Ground
Discovery cohort
Planets confirmed in 2015 at La Silla Observatory (10 shown).
Host System: Wolf 1061
Spectral Class
M-type red dwarf
Effective Temperature
3,342 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.307 R☉
Stellar Mass
0.294 M☉
Metallicity [Fe/H]
-0.09
Extended Stellar Properties
Surface gravity (log g)
4.902 dex
Stellar density
12.748 g/cm³
Systemic radial velocity
-21.04 km/s
Rotation period
95.00 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 8 bands
Astrometric Data
Parallax
232.210 mas
Total Proper Motion
1,187.508 mas/yr
PM Right Ascension
-94.03 mas/yr
PM Declination
-1,183.78 mas/yr
Galactic Cartesian (pc)
x = -0.372 · y = -0.902 · z = -0.219
Equatorial (J2000)
RA 247.57483° · Dec -12.66769°
Galactic ℓ, b
3.347° · 23.677°
Ecliptic λ, β
247.854° · 9.064°
HTM-20 index
922353005
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