Key parameters at a glance
- A radius of 1.77 Earth radii
- A mass of 3.80 Earth masses
- Surface gravity around 1.21 g
- An orbital period of 28.140 days
- Semi-major axis 0.1250 AU
- Distance from Earth 23.63 light-years
- Earth Similarity Index 0.831
- Travel time at Voyager 1 speed 416,655 years
- Almost certainly tidally locked to its host star given the close orbit
Context from the literature
Gliese 667 Cc is an exoplanet orbiting within the habitable zone of the red dwarf star Gliese 667 C, which is a member of the Gliese 667 triple-star system, approximately 23.62 light-years away in the constellation of Scorpius. The exoplanet was found by using the radial velocity method, from radial-velocity measurements via observation of Doppler shifts in the spectrum of the planet's parent star. Gliese 667 Cc is sometimes considered as the first confirmed potentially habitable exoplanet.
Excerpted from Wikipedia · full article
1 sibling around GJ 667 C
GJ 667 C c shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| GJ 667 C b | Sub-Neptune | 2.25 | 5.68 | 7.203 | — | 2012 |
| GJ 667 C c this | Super-Earth | 1.77 | 3.80 | 28.140 | — | 2013 |
GJ 667 C c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#293of 1176
top 24.8%
This planet
1.77R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | GJ 667 C c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.77 | 11.21 |
| Mass (M⊕) | 1.00 | 3.80 | 317.83 |
| Density (g/cm³) | 5.51 | 3.77 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.21 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 3.800 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
TIC
TIC 154385809
Gaia DR2
Gaia DR2 5975663354131618304
Gaia DR3
Gaia DR3 5975663354131618304
System
GJ 667
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 28.14 Earth days (7.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1250 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.831
0 = alien, 1 = Earth-identical
Insufficient insolation data. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Anglada Escude et al. 2013Instrument
HARPS Spectrograph
Publication
2013-08
Observation locale
Ground
Discovery cohort
Planets confirmed in 2013 at La Silla Observatory (10 shown).
Host System: GJ 667 C
Spectral Class
M-type red dwarf
Effective Temperature
3,350 K — cooler than the Sun (5,778 K)
Estimated Age
2.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
—
Stellar Mass
0.330 M☉
Metallicity [Fe/H]
-0.55
Extended Stellar Properties
Surface gravity (log g)
4.690 dex
Systemic radial velocity
6.50 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 10 bands
Astrometric Data
Parallax
138.017 mas
Total Proper Motion
1,151.955 mas/yr
PM Right Ascension
1,131.61 mas/yr
PM Declination
-215.55 mas/yr
Galactic Cartesian (pc)
x = -0.146 · y = -0.806 · z = -0.574
Equatorial (J2000)
RA 259.75106° · Dec -34.99777°
Galactic ℓ, b
351.842° · 1.410°
Ecliptic λ, β
261.431° · -11.863°
HTM-20 index
-1660932496
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