Key parameters at a glance
- A radius of 13.45 Earth radii
- A mass of 349.61 Earth masses
- Surface gravity around 1.93 g
- An orbital period of 86.679 days
- Semi-major axis 0.3925 AU
- Equilibrium temperature 434 K (161 °C)
- Distance from Earth 3,269.81 light-years
- Earth Similarity Index 0.348
- Travel time at Voyager 1 speed 57,663,127 years
1 sibling around Kepler-418
Kepler-418 b 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 |
|---|---|---|---|---|---|---|
| Kepler-418 c | Neptune-like | 5.22 | 23.70 | 12.218 | 835 | 2021 |
| Kepler-418 b this | Gas Giant | 13.45 | 349.61 | 86.679 | 434 | 2014 |
Kepler-418 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#726of 1771
top 40.9%
This planet
13.45R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | Kepler-418 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.45 | 11.21 |
| Mass (M⊕) | 1.00 | 349.61 | 317.83 |
| Density (g/cm³) | 5.51 | — | 1.33 |
| Surface Gravity (g) | 1.00 | 1.93 | 2.53 |
| Insolation (S⊕) | 1.00 | 8.88 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 349.611 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 377871791
Gaia DR2
Gaia DR2 2052117923590073600
Gaia DR3
Gaia DR3 2052117923590073600
System
Kepler-418
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 86.68 Earth days (23.7% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.3925 AU.
Transit Fingerprint
Depth
0.824 %
Duration
10.224 h
Impact parameter b
0.230
Rp / R★
0.110400
Transit midpoint (BJD)
2,455,008.5975
Photometric dip
Transit produces a flux drop of 8,244 ppm lasting ≈ 10.22 h.
Extended Orbital Architecture
Planet / star radius ratio
0.110400
Semi-major axis / stellar radius
84.400
Impact parameter (b)
0.230
RV semi-amplitude (K)
50.000 m/s
Transit mid-time (BJD)
2,455,008.5975
Long. of periastron (ω)
4.35°
Angular separation (arcsec)
0.39100
Eq. Temperature
434K
(161 °C)
Insolation (S⊕)
8.88
Earth = 1.00
Earth Similarity (ESI)
0.348
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
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
Tingley et al. 2014Instrument
Kepler CCD Array
Publication
2014-07
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
Host System: Kepler-418
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,820 K — hotter than the Sun (5,778 K)
Estimated Age
7.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.090 R☉
Stellar Mass
0.980 M☉
Metallicity [Fe/H]
-0.05
Extended Stellar Properties
Surface gravity (log g)
4.350 dex
Stellar density
1.510 g/cm³
Systemic radial velocity
-18.45 km/s
Rotational v·sin i
3.50 km/s
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.969 mas
Total Proper Motion
2.672 mas/yr
PM Right Ascension
-0.78 mas/yr
PM Declination
2.55 mas/yr
Galactic Cartesian (pc)
x = 0.324 · y = -0.714 · z = 0.621
Equatorial (J2000)
RA 294.43352° · Dec 38.35547°
Galactic ℓ, b
72.018° · 8.218°
Ecliptic λ, β
308.468° · 58.575°
HTM-20 index
-2088815434
Similar Worlds
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