Key parameters at a glance
- A radius of 3.68 Earth radii
- A mass of 13.10 Earth masses
- Surface gravity around 0.97 g
- An orbital period of 11.815 days
- Semi-major axis 0.1050 AU
- Equilibrium temperature 762 K (489 °C)
- Distance from Earth 1,595.36 light-years
- Earth Similarity Index 0.284
- Travel time at Voyager 1 speed 28,134,220 years
1 sibling around Kepler-318
Kepler-318 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-318 b | Neptune-like | 4.71 | 19.90 | 4.663 | 1,039 | 2014 |
| Kepler-318 c this | Sub-Neptune | 3.68 | 13.10 | 11.815 | 762 | 2014 |
Kepler-318 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#98of 1978
top 4.9%
This planet
3.68R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-318 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.68 | 11.21 |
| Mass (M⊕) | 1.00 | 13.10 | 317.83 |
| Density (g/cm³) | 5.51 | 1.44 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.97 | 2.53 |
| Insolation (S⊕) | 1.00 | 96.51 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 274198407
Gaia DR2
Gaia DR2 2085559604106082688
Gaia DR3
Gaia DR3 2085559604106082688
System
Kepler-318
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 11.82 Earth days (3.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1050 AU.
Transit Fingerprint
Depth
0.098 %
Duration
2.556 h
Impact parameter b
0.010
Rp / R★
0.028571
Transit midpoint (BJD)
2,454,966.0897
Photometric dip
Transit produces a flux drop of 984 ppm lasting ≈ 2.56 h.
Extended Orbital Architecture
Planet / star radius ratio
0.028571
Semi-major axis / stellar radius
36.756
Impact parameter (b)
0.010
Transit mid-time (BJD)
2,454,966.0897
Angular separation (arcsec)
0.21500
Eq. Temperature
762K
(489 °C)
Insolation (S⊕)
96.51
Earth = 1.00
Earth Similarity (ESI)
0.284
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-318
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,746 K — cooler than the Sun (5,778 K)
Estimated Age
0.95 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.189 R☉
Stellar Mass
1.073 M☉
Metallicity [Fe/H]
0.33
Extended Stellar Properties
Surface gravity (log g)
4.325 dex
Stellar density
1.120 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.016 mas
Total Proper Motion
3.462 mas/yr
PM Right Ascension
1.84 mas/yr
PM Declination
2.93 mas/yr
Galactic Cartesian (pc)
x = 0.326 · y = -0.602 · z = 0.729
Equatorial (J2000)
RA 298.48283° · Dec 46.79364°
Galactic ℓ, b
80.952° · 9.687°
Ecliptic λ, β
321.233° · 65.246°
HTM-20 index
42241302
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