Key parameters at a glance
- A radius of 3.11 Earth radii
- A mass of 9.85 Earth masses
- Surface gravity around 1.02 g
- An orbital period of 213.258 days
- Semi-major axis 0.6085 AU
- Equilibrium temperature 202 K (-71 °C)
- Distance from Earth 1,550.05 light-years
- Earth Similarity Index 0.539
- Travel time at Voyager 1 speed 27,335,128 years
Kepler-1318 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#426of 1978
top 21.5%
This planet
3.11R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1318 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.11 | 11.21 |
| Mass (M⊕) | 1.00 | 9.85 | 317.83 |
| Density (g/cm³) | 5.51 | 1.80 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.02 | 2.53 |
| Insolation (S⊕) | 1.00 | 0.49 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 122442545
Gaia DR2
Gaia DR2 2101775579545559296
Gaia DR3
Gaia DR3 2101775579545559296
System
Kepler-1318
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 213.26 Earth days (58.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.6085 AU.
Transit Fingerprint
Depth
0.219 %
Duration
7.775 h
Impact parameter b
0.030
Rp / R★
0.040946
Transit midpoint (BJD)
2,455,101.1359
Photometric dip
Transit produces a flux drop of 2,190 ppm lasting ≈ 7.78 h.
Extended Orbital Architecture
Planet / star radius ratio
0.040946
Semi-major axis / stellar radius
218.000
Impact parameter (b)
0.030
Transit mid-time (BJD)
2,455,101.1359
Angular separation (arcsec)
1.28000
Eq. Temperature
202K
(-71 °C)
Insolation (S⊕)
0.49
Earth = 1.00
Earth Similarity (ESI)
0.539
0 = alien, 1 = Earth-identical
Within the conservative habitable zone — surface water would be frozen.
Discovery Paper
Primary reference
Morton et al. 2016Instrument
Kepler CCD Array
Publication
2016-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at Kepler (12 shown).
Host System: Kepler-1318
Spectral Class
K-type orange
Effective Temperature
4,598 K — cooler than the Sun (5,778 K)
Estimated Age
4.57 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.700 R☉
Stellar Mass
0.730 M☉
Metallicity [Fe/H]
-0.01
Extended Stellar Properties
Surface gravity (log g)
4.620 dex
Stellar density
4.297 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
2.076 mas
Total Proper Motion
12.402 mas/yr
PM Right Ascension
6.06 mas/yr
PM Declination
10.82 mas/yr
Galactic Cartesian (pc)
x = 0.262 · y = -0.706 · z = 0.658
Equatorial (J2000)
RA 290.37632° · Dec 41.15079°
Galactic ℓ, b
73.119° · 12.262°
Ecliptic λ, β
304.190° · 62.192°
HTM-20 index
-1606247085
Similar Worlds
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TOI-1260 d
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Kepler-749 b
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Kepler-224 c
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HD 13808 c
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Kepler-859 b
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Radius 3.09 R⊕ · 2,739.4 ly