Key parameters at a glance
- A radius of 5.22 Earth radii
- A mass of 23.70 Earth masses
- Surface gravity around 0.87 g
- An orbital period of 12.218 days
- Semi-major axis 0.1063 AU
- Equilibrium temperature 835 K (562 °C)
- Distance from Earth 3,269.81 light-years
- Earth Similarity Index 0.221
- Travel time at Voyager 1 speed 57,663,127 years
1 sibling around Kepler-418
Kepler-418 c 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 this | Neptune-like | 5.22 | 23.70 | 12.218 | 835 | 2021 |
| Kepler-418 b | Gas Giant | 13.45 | 349.61 | 86.679 | 434 | 2014 |
Kepler-418 c Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#354of 574
top 61.5%
This planet
5.22R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | Kepler-418 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 5.22 | 11.21 |
| Mass (M⊕) | 1.00 | 23.70 | 317.83 |
| Density (g/cm³) | 5.51 | 0.92 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.87 | 2.53 |
| Insolation (S⊕) | 1.00 | 107.60 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 377871791
Gaia DR2
Gaia DR2 2052117923590073600
Gaia DR3
Gaia DR3 2052117923590073600
System
Kepler-418
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 12.22 Earth days (3.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1063 AU.
Transit Fingerprint
Depth
0.184 %
Duration
2.572 h
Impact parameter b
0.885
Rp / R★
0.045520
Transit midpoint (BJD)
2,454,973.3211
Photometric dip
Transit produces a flux drop of 1,843 ppm lasting ≈ 2.57 h.
Extended Orbital Architecture
Planet / star radius ratio
0.045520
Semi-major axis / stellar radius
18.000
Impact parameter (b)
0.885
Transit mid-time (BJD)
2,454,973.3211
Angular separation (arcsec)
0.10600
Eq. Temperature
835K
(562 °C)
Insolation (S⊕)
107.60
Earth = 1.00
Earth Similarity (ESI)
0.221
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Discovery Paper
Primary reference
Valizadegan et al. 2022Instrument
Kepler CCD Array
Publication
2022-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Kepler (12 shown).
Host System: Kepler-418
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,822 K — hotter than the Sun (5,778 K)
Estimated Age
2.10 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.081 R☉
Stellar Mass
0.957 M☉
Metallicity [Fe/H]
-0.06
Extended Stellar Properties
Surface gravity (log g)
4.351 dex
Stellar density
1.767 g/cm³
Systemic radial velocity
-18.45 km/s
Rotational v·sin i
3.50 km/s
Metallicity ratio
[Fe/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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Neptune-like · G-type yellow (Sun-like)
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Kepler-495 b
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Kepler-841 b
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Kepler-562 b
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TOI-1710 b
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HD 10180 f
Neptune-like · G-type yellow (Sun-like)
Radius 5.24 R⊕ · 127.1 ly