Key parameters at a glance
- A radius of 2.37 Earth radii
- A mass of 6.50 Earth masses
- Surface gravity around 1.16 g
- An orbital period of 9.979 days
- Semi-major axis 0.0932 AU
- Equilibrium temperature 1,220 K (947 °C)
- Distance from Earth 263.86 light-years
- Earth Similarity Index 0.209
- Travel time at Voyager 1 speed 4,653,140 years
K2-167 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1391of 1978
top 70.3%
This planet
2.37R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | K2-167 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.37 | 11.21 |
| Mass (M⊕) | 1.00 | 6.50 | 317.83 |
| Density (g/cm³) | 5.51 | 2.87 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.16 | 2.53 |
| Insolation (S⊕) | 1.00 | 317.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 6.500 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HD
HD 212657
HIP
HIP 110758
TIC
TIC 69747919
Gaia DR2
Gaia DR2 2594479109451475456
Gaia DR3
Gaia DR3 2594479109451475456
System
K2-167
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 9.98 Earth days (2.7% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.0932 AU.
Transit Fingerprint
Depth
0.021 %
Duration
3.600 h
Impact parameter b
0.550
Rp / R★
0.014360
Transit midpoint (BJD)
2,457,299.2465
Photometric dip
Transit produces a flux drop of 206 ppm lasting ≈ 3.60 h.
Extended Orbital Architecture
Planet / star radius ratio
0.014360
Semi-major axis / stellar radius
13.370
Impact parameter (b)
0.550
RV semi-amplitude (K)
1.970 m/s
Transit mid-time (BJD)
2,457,299.2465
Long. of periastron (ω)
140.00°
Angular separation (arcsec)
1.15000
Eq. Temperature
1,220K
(947 °C)
Insolation (S⊕)
317.00
Earth = 1.00
Earth Similarity (ESI)
0.209
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Radial velocity
Stellar wobble has been measured spectroscopically.
Discovery Paper
Primary reference
Mayo et al. 2018Instrument
Kepler CCD Array
Publication
2018-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2018 at K2 (12 shown).
Host System: K2-167
Spectral Class
F-type yellow-white
Effective Temperature
6,310 K — hotter than the Sun (5,778 K)
Estimated Age
5.30 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.499 R☉
Stellar Mass
1.084 M☉
Metallicity [Fe/H]
-0.46
Extended Stellar Properties
Surface gravity (log g)
4.122 dex
Stellar density
0.454 g/cm³
Systemic radial velocity
-17.38 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
12.333 mas
Total Proper Motion
136.122 mas/yr
PM Right Ascension
73.61 mas/yr
PM Declination
-114.51 mas/yr
Galactic Cartesian (pc)
x = 0.873 · y = -0.378 · z = -0.309
Equatorial (J2000)
RA 336.57612° · Dec -18.01167°
Galactic ℓ, b
40.459° · -55.412°
Ecliptic λ, β
331.697° · -7.661°
HTM-20 index
1502140599
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