Key parameters at a glance
- A radius of 2.53 Earth radii
- A mass of 6.94 Earth masses
- Surface gravity around 1.08 g
- An orbital period of 7.727 days
- Semi-major axis 0.0698 AU
- Equilibrium temperature 666 K (393 °C)
- Distance from Earth 1,192.36 light-years
- Earth Similarity Index 0.378
- Travel time at Voyager 1 speed 21,027,344 years
- Almost certainly tidally locked to its host star given the close orbit
K2-119 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1133of 1978
top 57.2%
This planet
2.53R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | K2-119 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.53 | 11.21 |
| Mass (M⊕) | 1.00 | 6.94 | 317.83 |
| Density (g/cm³) | 5.51 | 2.35 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.08 | 2.53 |
| Insolation (S⊕) | 1.00 | 54.90 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 293460551
Gaia DR2
Gaia DR2 658274970145911424
Gaia DR3
Gaia DR3 658274970145911424
System
K2-119
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 7.73 Earth days (2.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0698 AU.
Transit Fingerprint
Depth
0.123 %
Duration
2.904 h
Impact parameter b
0.410
Rp / R★
0.032800
Transit midpoint (BJD)
2,457,148.8311
Photometric dip
Transit produces a flux drop of 1,233 ppm lasting ≈ 2.90 h.
Extended Orbital Architecture
Planet / star radius ratio
0.032800
Semi-major axis / stellar radius
19.230
Impact parameter (b)
0.410
Transit mid-time (BJD)
2,457,148.8311
Long. of periastron (ω)
-37.71°
Angular separation (arcsec)
0.19100
Eq. Temperature
666K
(393 °C)
Insolation (S⊕)
54.90
Earth = 1.00
Earth Similarity (ESI)
0.378
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Dressing et al. 2017Instrument
Kepler CCD Array
Publication
2017-11
Observation locale
Space
Discovery cohort
Planets confirmed in 2017 at K2 (12 shown).
Host System: K2-119
Spectral Class
K-type orange
Effective Temperature
4,740 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.710 R☉
Stellar Mass
0.760 M☉
Metallicity [Fe/H]
-0.05
Extended Stellar Properties
Surface gravity (log g)
4.620 dex
Stellar density
2.251 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
2.707 mas
Total Proper Motion
37.488 mas/yr
PM Right Ascension
30.03 mas/yr
PM Declination
-22.44 mas/yr
Galactic Cartesian (pc)
x = -0.640 · y = 0.711 · z = 0.291
Equatorial (J2000)
RA 132.00987° · Dec 16.90177°
Galactic ℓ, b
209.765° · 33.186°
Ecliptic λ, β
129.820° · -0.920°
HTM-20 index
-1683586377
Similar Worlds
HD 15337 c
Sub-Neptune · K-type orange
Radius 2.53 R⊕ · 146.2 ly
TOI-1648 b
Sub-Neptune · K-type orange
Radius 2.54 R⊕ · 227.8 ly
K2-118 b
Sub-Neptune · K-type orange
Radius 2.54 R⊕ · 1,049.3 ly
Kepler-1350 b
Sub-Neptune · K-type orange
Radius 2.52 R⊕ · 1,111.2 ly
K2-16 c
Sub-Neptune · K-type orange
Radius 2.54 R⊕ · 1,092.5 ly
Kepler-991 b
Sub-Neptune · K-type orange
Radius 2.54 R⊕ · 1,270.6 ly