Key parameters at a glance
- A radius of 13.80 Earth radii
- A mass of 301.94 Earth masses
- Surface gravity around 1.59 g
- An orbital period of 2,288.000 days
- Semi-major axis 2.4100 AU
- Distance from Earth 40.30 light-years
- Earth Similarity Index 0.305
- Travel time at Voyager 1 speed 710,688 years
GJ 179 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#510of 1771
top 28.7%
This planet
13.80R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | GJ 179 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.80 | 11.21 |
| Mass (M⊕) | 1.00 | 301.94 | 317.83 |
| Density (g/cm³) | 5.51 | 0.63 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.59 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 301.937 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 260.610 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HIP
HIP 22627
TIC
TIC 450102450
Gaia DR2
Gaia DR2 3288082758293022848
Gaia DR3
Gaia DR3 3288082758293022848
System
GJ 179
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 6.26 Earth years on a mildly elliptical path at a mean orbital distance of 2.4100 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
25.800 m/s
Transit mid-time (BJD)
2,454,876.0000
Long. of periastron (ω)
153.00°
Angular separation (arcsec)
195.00000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.305
0 = alien, 1 = Earth-identical
Detection Signatures
Radial velocity
Stellar wobble has been measured spectroscopically.
Astrometry
Positional wobble of the host star was measured.
Discovery Paper
Primary reference
Howard et al. 2010Instrument
HIRES Spectrometer
Publication
2010-10
Observation locale
Ground
Discovery cohort
Planets confirmed in 2009 at W. M. Keck Observatory (12 shown).
Host System: GJ 179
Spectral Class
M-type red dwarf
Effective Temperature
3,370 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.380 R☉
Stellar Mass
0.357 M☉
Metallicity [Fe/H]
0.30
Extended Stellar Properties
Surface gravity (log g)
4.830 dex
Stellar density
9.675 g/cm³
Rotational v·sin i
1.50 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
80.904 mas
Total Proper Motion
342.403 mas/yr
PM Right Ascension
153.43 mas/yr
PM Declination
-306.11 mas/yr
Galactic Cartesian (pc)
x = 0.290 · y = 0.950 · z = 0.113
Equatorial (J2000)
RA 73.02455° · Dec 6.47523°
Galactic ℓ, b
192.227° · -22.863°
Ecliptic λ, β
72.437° · -15.935°
HTM-20 index
-2101642504
Observation Record
Photometric series
1
RV measurements
2
Stellar spectra
2
Similar Worlds
GJ 832 b
Gas Giant · M-type red dwarf
Radius 13.80 R⊕ · 16.2 ly
GJ 849 c
Gas Giant · M-type red dwarf
Radius 13.80 R⊕ · 28.7 ly
GJ 849 b
Gas Giant · M-type red dwarf
Radius 13.90 R⊕ · 28.7 ly
VHS J125601.92-125723.9 b
Gas Giant · M-type red dwarf
Radius 13.67 R⊕ · 41.4 ly
TOI-4201 b
Gas Giant · M-type red dwarf
Radius 13.67 R⊕ · 616.5 ly
AT2021ueyL b
Gas Giant · M-type red dwarf
Radius 13.60 R⊕ · 3,392.0 ly