Key parameters at a glance
- A radius of 10.59 Earth radii
- A mass of 638.84 Earth masses
- Surface gravity around 5.69 g
- An orbital period of 11.391 days
- Semi-major axis 0.0944 AU
- Equilibrium temperature 701 K (428 °C)
- Distance from Earth 1,551.71 light-years
- Earth Similarity Index 0.257
- Travel time at Voyager 1 speed 27,364,462 years
- Almost certainly tidally locked to its host star given the close orbit
K2-114 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1717of 1771
top 96.9%
This planet
10.59R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | K2-114 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 10.59 | 11.21 |
| Mass (M⊕) | 1.00 | 638.84 | 317.83 |
| Density (g/cm³) | 5.51 | 2.96 | 1.33 |
| Surface Gravity (g) | 1.00 | 5.69 | 2.53 |
| Insolation (S⊕) | 1.00 | 40.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 638.835 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 366576758
Gaia DR2
Gaia DR2 602494855483616256
Gaia DR3
Gaia DR3 602494855483616256
System
K2-114
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 11.39 Earth days (3.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0944 AU.
Transit Fingerprint
Depth
1.361 %
Duration
3.970 h
Impact parameter b
0.378
Rp / R★
0.116700
Transit midpoint (BJD)
2,457,687.0887
Photometric dip
Transit produces a flux drop of 13,610 ppm lasting ≈ 3.97 h.
Extended Orbital Architecture
Planet / star radius ratio
0.116700
Semi-major axis / stellar radius
24.400
Impact parameter (b)
0.378
RV semi-amplitude (K)
200.000 m/s
Transit mid-time (BJD)
2,457,687.0887
Long. of periastron (ω)
-50.00°
Angular separation (arcsec)
0.19800
Eq. Temperature
701K
(428 °C)
Insolation (S⊕)
40.00
Earth = 1.00
Earth Similarity (ESI)
0.257
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.
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
Shporer et al. 2017Instrument
Kepler CCD Array
Publication
2017-11
Observation locale
Space
Discovery cohort
Planets confirmed in 2017 at K2 (12 shown).
Host System: K2-114
Spectral Class
K-type orange
Effective Temperature
4,899 K — cooler than the Sun (5,778 K)
Estimated Age
7.60 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.832 R☉
Stellar Mass
0.863 M☉
Metallicity [Fe/H]
0.42
Extended Stellar Properties
Surface gravity (log g)
4.534 dex
Stellar density
2.110 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
2.073 mas
Total Proper Motion
13.376 mas/yr
PM Right Ascension
-13.15 mas/yr
PM Declination
-2.45 mas/yr
Galactic Cartesian (pc)
x = -0.601 · y = 0.772 · z = 0.207
Equatorial (J2000)
RA 127.88291° · Dec 11.92226°
Galactic ℓ, b
213.246° · 27.551°
Ecliptic λ, β
127.225° · -6.756°
HTM-20 index
200172412
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