Key parameters at a glance
- A radius of 7.68 Earth radii
- A mass of 45.70 Earth masses
- Surface gravity around 0.77 g
- An orbital period of 20.172 days
- Semi-major axis 0.1410 AU
- Equilibrium temperature 564 K (291 °C)
- Distance from Earth 1,872.88 light-years
- Earth Similarity Index 0.271
- Travel time at Voyager 1 speed 33,028,221 years
1 sibling around Kepler-118
Kepler-118 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-118 b | Super-Earth | 1.96 | 4.50 | 7.518 | 784 | 2014 |
| Kepler-118 c this | Neptune-like | 7.68 | 45.70 | 20.172 | 564 | 2014 |
Kepler-118 c Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#168of 574
top 29.1%
This planet
7.68R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | Kepler-118 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 7.68 | 11.21 |
| Mass (M⊕) | 1.00 | 45.70 | 317.83 |
| Density (g/cm³) | 5.51 | 0.55 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.77 | 2.53 |
| Insolation (S⊕) | 1.00 | 21.41 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 171884427
Gaia DR2
Gaia DR2 2075162656527684864
Gaia DR3
Gaia DR3 2075162656527684864
System
Kepler-118
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 20.17 Earth days (5.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1410 AU.
Transit Fingerprint
Depth
0.537 %
Duration
3.108 h
Impact parameter b
0.020
Rp / R★
0.067321
Transit midpoint (BJD)
2,454,974.2084
Photometric dip
Transit produces a flux drop of 5,368 ppm lasting ≈ 3.11 h.
Extended Orbital Architecture
Planet / star radius ratio
0.067321
Semi-major axis / stellar radius
52.621
Impact parameter (b)
0.020
Transit mid-time (BJD)
2,454,974.2084
Angular separation (arcsec)
0.24600
Eq. Temperature
564K
(291 °C)
Insolation (S⊕)
21.41
Earth = 1.00
Earth Similarity (ESI)
0.271
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
Rowe et al. 2014Instrument
Kepler CCD Array
Publication
2014-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
Host System: Kepler-118
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,274 K — cooler than the Sun (5,778 K)
Estimated Age
13.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.094 R☉
Stellar Mass
0.811 M☉
Metallicity [Fe/H]
0.18
Extended Stellar Properties
Surface gravity (log g)
4.321 dex
Stellar density
6.774 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.713 mas
Total Proper Motion
11.822 mas/yr
PM Right Ascension
6.50 mas/yr
PM Declination
-9.87 mas/yr
Galactic Cartesian (pc)
x = 0.366 · y = -0.654 · z = 0.662
Equatorial (J2000)
RA 299.21319° · Dec 41.42482°
Galactic ℓ, b
76.530° · 6.534°
Ecliptic λ, β
317.333° · 60.154°
HTM-20 index
-239962899
Similar Worlds
K2-60 b
Neptune-like · G-type yellow (Sun-like)
Radius 7.66 R⊕ · 1,604.3 ly
Kepler-952 b
Neptune-like · G-type yellow (Sun-like)
Radius 7.65 R⊕ · 4,253.9 ly
OGLE-2012-BLG-0026L b
Neptune-like · G-type yellow (Sun-like)
Radius 7.72 R⊕ · 13,108.2 ly
K2-87 b
Neptune-like · G-type yellow (Sun-like)
Radius 7.60 R⊕ · 1,602.2 ly
HD 134606 d
Neptune-like · G-type yellow (Sun-like)
Radius 7.59 R⊕ · 87.4 ly
55 Cnc f
Neptune-like · G-type yellow (Sun-like)
Radius 7.59 R⊕ · 41.0 ly