Key parameters at a glance
- A radius of 12.90 Earth radii
- A mass of 1,404.81 Earth masses
- Surface gravity around 8.44 g
- An orbital period of 15.765 days
- Semi-major axis 0.1100 AU
- Distance from Earth 35.17 light-years
- Earth Similarity Index 0.424
- Travel time at Voyager 1 speed 620,247 years
- Almost certainly tidally locked to its host star given the close orbit
GJ 86 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1011of 1771
top 57.0%
This planet
12.90R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | GJ 86 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.90 | 11.21 |
| Mass (M⊕) | 1.00 | 1,404.81 | 317.83 |
| Density (g/cm³) | 5.51 | 3.60 | 1.33 |
| Surface Gravity (g) | 1.00 | 8.44 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 1,404.809 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 13445
HIP
HIP 10138
TIC
TIC 220017951
Gaia DR2
Gaia DR2 4937000898855759104
Gaia DR3
Gaia DR3 4937000898856156288
System
GJ 86
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 15.76 Earth days (4.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1100 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.424
0 = alien, 1 = Earth-identical
Insufficient insolation data. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Queloz et al. 2000Instrument
CORALIE Spectrograph
Publication
2000-02
Observation locale
Ground
Discovery cohort
Planets confirmed in 1999 at La Silla Observatory (4 shown).
Host System: GJ 86
Spectral Class
K-type orange
Effective Temperature
5,182 K — cooler than the Sun (5,778 K)
Estimated Age
11.30 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.770 R☉
Stellar Mass
0.930 M☉
Metallicity [Fe/H]
-0.22
Extended Stellar Properties
Surface gravity (log g)
4.630 dex
Stellar density
2.512 g/cm³
Systemic radial velocity
55.23 km/s
Rotational v·sin i
2.37 km/s
Rotation period
30.00 days
Activity index (log R'HK)
-4.740
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
92.704 mas
Total Proper Motion
2,218.592 mas/yr
PM Right Ascension
2,124.85 mas/yr
PM Declination
638.09 mas/yr
Galactic Cartesian (pc)
x = 0.532 · y = 0.341 · z = -0.775
Equatorial (J2000)
RA 32.62248° · Dec -50.82099°
Galactic ℓ, b
275.908° · -61.957°
Ecliptic λ, β
0.440° · -57.853°
HTM-20 index
1892127212
Observation Record
Photometric series
1
RV measurements
3
Archive notes
4
Similar Worlds
HD 112640 b
Gas Giant · K-type orange
Radius 12.90 R⊕ · 1,054.6 ly
HIP 66074 b
Gas Giant · K-type orange
Radius 12.90 R⊕ · 115.6 ly
HIP 70849 b
Gas Giant · K-type orange
Radius 12.90 R⊕ · 78.5 ly
HD 111591 b
Gas Giant · K-type orange
Radius 12.90 R⊕ · 372.4 ly
HD 102272 b
Gas Giant · K-type orange
Radius 12.90 R⊕ · 1,132.1 ly
BD-210397 c
Gas Giant · K-type orange
Radius 12.90 R⊕ · 77.4 ly