Key parameters at a glance

A radius of 1.66 Earth radii
A mass of 3.39 Earth masses
Surface gravity around 1.23 g
An orbital period of 7.010 days
Semi-major axis 0.0911 AU
Equilibrium temperature 456 K (183 °C)
Distance from Earth 482.27 light-years
Earth Similarity Index 0.622
Travel time at Voyager 1 speed 8,504,899 years
Almost certainly tidally locked to its host star given the close orbit

K2-318 b Planet Profile

Physical Specs

Radius

1.66 R⊕

Radius (Jupiter)

0.148 R♃

Mass

3.39 M⊕

Mass (Jupiter)

0.011 M♃

Density

4.07 g/cm³

Surface Gravity

1.23 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.622

HZ Position Unknown

Controversial No

Discovery

Year 2020

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#469of 1176

top 39.8%

This planet

1.66R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-379 b 1.66 R⊕ Kepler-1497 b 1.66 R⊕ GJ 357 c 1.66 R⊕

Metric	Earth	K2-318 b	Jupiter
Radius (R⊕)	1.00	1.66	11.21
Mass (M⊕)	1.00	3.39	317.83
Density (g/cm³)	5.51	4.07	1.33
Surface Gravity (g)	1.00	1.23	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 335322931

Gaia DR2

Gaia DR2 6258364939144564992

Gaia DR3

Gaia DR3 6258364939144564992

System

K2-318

Percentile among Super-Earth cohort

Radius 1.660 R⊕ · percentile 59 / cohort 1176

Mass 3.390 M⊕ · percentile 54 / cohort 1176

Orbital period 7.01 d · percentile 52 / cohort 1164

Distance 147.87 pc · percentile 20 / cohort 1171

ESI 0.622 · percentile 81 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

7.010 days

Semi-major axis

0.0911 AU

Eccentricity

—

Inclination

89.38 °

Year Length

A year here lasts approximately 7.01 Earth days (1.9% of a terrestrial year) at a mean orbital distance of 0.0911 AU.

Transit Fingerprint

Depth

0.085 %

Impact parameter b

0.400

Transit midpoint (BJD)

2,457,997.1940

Photometric dip

Transit produces a flux drop of 850 ppm.

Eq. Temperature

456K

(183 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.622

0 = alien, 1 = Earth-identical

Insufficient insolation data — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Castro Gonz Aacute Lez et al. 2020

Instrument

Kepler CCD Array

Publication

2020-12

Observation locale

Space

Discovery cohort

Planets confirmed in 2020 at K2 (12 shown).

EPIC 201170410.02 · Rocky Terrestrial EPIC 201757695.02 · Rocky Terrestrial K2-323 b · Sub-Neptune K2-315 b · Rocky Terrestrial K2-316 c · Super-Earth K2-325 b · Sub-Neptune K2-317 b · Sub-Neptune K2-322 b · Super-Earth K2-319 b · Sub-Neptune K2-316 b · Super-Earth K2-324 b · Sub-Neptune K2-320 b · Sub-Neptune

Host System: K2-318

Spectral Class

K-type orange

Effective Temperature

3,851 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.552 R☉

Stellar Mass

0.561 M☉

Metallicity [Fe/H]

—

Distance

147.87 parsec

Light-years 482.27 ly

V-band magnitude

15.80 mag

Voyager-speed travel 8,504,899 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

6.734 mas

Total Proper Motion

70.624 mas/yr

PM Right Ascension

-55.08 mas/yr

PM Declination

-44.20 mas/yr

Galactic Cartesian (pc)

x = -0.581 · y = -0.756 · z = -0.302

Equatorial (J2000)

RA 232.44614° · Dec -17.55746°

Galactic ℓ, b

348.123° · 31.089°

Ecliptic λ, β

234.456° · 1.369°

HTM-20 index

1919706648

Similar Worlds

Kepler-1418 b

Super-Earth · K-type orange

Radius 1.66 R⊕ · 1,627.5 ly

Kepler-1977 b

Super-Earth · K-type orange

Radius 1.66 R⊕ · 1,933.2 ly

Kepler-1795 b

Super-Earth · K-type orange

Radius 1.66 R⊕ · —

Kepler-1687 b

Super-Earth · K-type orange

Radius 1.66 R⊕ · 1,360.1 ly

TOI-871 b

Super-Earth · K-type orange

Radius 1.66 R⊕ · 221.9 ly

Kepler-763 d

Super-Earth · K-type orange

Radius 1.67 R⊕ · 3,139.1 ly

Explore Related Categories

Super-Earth Planets Transit Discoveries K2 Mission K-type orange Hosts