Key parameters at a glance
- A radius of 15.98 Earth radii
- A mass of 266.98 Earth masses
- Surface gravity around 1.05 g
- An orbital period of 3.314 days
- Semi-major axis 0.0475 AU
- Equilibrium temperature 1,649 K (1376 °C)
- Distance from Earth 2,234.82 light-years
- Earth Similarity Index 0.065
- Travel time at Voyager 1 speed 39,411,065 years
K2-107 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#164of 1771
top 9.2%
This planet
15.98R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | K2-107 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 15.98 | 11.21 |
| Mass (M⊕) | 1.00 | 266.98 | 317.83 |
| Density (g/cm³) | 5.51 | 0.35 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.05 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 266.977 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 414843476
Gaia DR2
Gaia DR2 4081684580199958528
Gaia DR3
Gaia DR3 4081684580199958528
System
K2-107
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.31 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0475 AU.
Transit Fingerprint
Depth
0.666 %
Duration
3.223 h
Impact parameter b
0.740
Rp / R★
0.081000
Transit midpoint (BJD)
2,457,311.1518
Photometric dip
Transit produces a flux drop of 6,658 ppm lasting ≈ 3.22 h.
Extended Orbital Architecture
Planet / star radius ratio
0.081000
Semi-major axis / stellar radius
6.420
Impact parameter (b)
0.740
RV semi-amplitude (K)
95.500 m/s
Transit mid-time (BJD)
2,457,311.1518
Angular separation (arcsec)
0.06930
Eq. Temperature
1,649K
(1376 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.065
0 = alien, 1 = Earth-identical
Insufficient insolation data — 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
Eigm Uuml Ller et al. 2017Instrument
Kepler CCD Array
Publication
2017-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2017 at K2 (12 shown).
Host System: K2-107
Spectral Class
F-type yellow-white
Effective Temperature
6,061 K — hotter than the Sun (5,778 K)
Estimated Age
4.25 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.810 R☉
Stellar Mass
1.300 M☉
Metallicity [Fe/H]
0.14
Extended Stellar Properties
Surface gravity (log g)
4.040 dex
Stellar density
0.457 g/cm³
Systemic radial velocity
-8.36 km/s
Rotational v·sin i
4.60 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
1.432 mas
Total Proper Motion
7.681 mas/yr
PM Right Ascension
-6.25 mas/yr
PM Declination
-4.47 mas/yr
Galactic Cartesian (pc)
x = 0.239 · y = -0.894 · z = -0.379
Equatorial (J2000)
RA 284.98536° · Dec -22.29342°
Galactic ℓ, b
13.733° · -11.743°
Ecliptic λ, β
283.838° · 0.429°
HTM-20 index
620423465
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