Key parameters at a glance

A radius of 1.83 Earth radii
A mass of 4.01 Earth masses
Surface gravity around 1.20 g
An orbital period of 5.260 days
Semi-major axis 0.0582 AU
Equilibrium temperature 423 K (150 °C)
Distance from Earth 366.88 light-years
Earth Similarity Index 0.642
Travel time at Voyager 1 speed 6,469,926 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around K2-316

K2-316 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
K2-316 b	Super-Earth	1.33	2.33	1.133	841	2020
K2-316 c this	Super-Earth	1.83	4.01	5.260	423	2020

K2-316 c Planet Profile

Physical Specs

Radius

1.83 R⊕

Radius (Jupiter)

0.163 R♃

Mass

4.01 M⊕

Mass (Jupiter)

0.013 M♃

Density

3.60 g/cm³

Surface Gravity

1.20 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.642

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

#221of 1176

top 18.7%

This planet

1.83R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-110 b 1.83 R⊕ TOI-1743 b 1.83 R⊕ WASP-47 e 1.83 R⊕

Metric	Earth	K2-316 c	Jupiter
Radius (R⊕)	1.00	1.83	11.21
Mass (M⊕)	1.00	4.01	317.83
Density (g/cm³)	5.51	3.60	1.33
Surface Gravity (g)	1.00	1.20	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 73943566

Gaia DR2

Gaia DR2 6239410080231903488

Gaia DR3

Gaia DR3 6239410080231903488

System

K2-316

Percentile among Super-Earth cohort

Radius 1.830 R⊕ · percentile 80 / cohort 1176

Mass 4.010 M⊕ · percentile 74 / cohort 1176

Orbital period 5.26 d · percentile 42 / cohort 1164

Distance 112.49 pc · percentile 18 / cohort 1171

ESI 0.642 · percentile 83 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

5.260 days

Semi-major axis

0.0582 AU

Eccentricity

—

Inclination

89.31 °

Year Length

A year here lasts approximately 5.26 Earth days (1.4% of a terrestrial year) at a mean orbital distance of 0.0582 AU.

Transit Fingerprint

Depth

0.248 %

Impact parameter b

0.400

Transit midpoint (BJD)

2,457,994.1230

Photometric dip

Transit produces a flux drop of 2,480 ppm.

Eq. Temperature

423K

(150 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.642

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 K2-318 b · 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: K2-316

Spectral Class

M-type red dwarf

Effective Temperature

3,436 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.379 R☉

Stellar Mass

0.408 M☉

Metallicity [Fe/H]

—

Distance

112.49 parsec

Light-years 366.88 ly

V-band magnitude

17.14 mag

Voyager-speed travel 6,469,926 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

8.862 mas

Total Proper Motion

64.474 mas/yr

PM Right Ascension

-0.39 mas/yr

PM Declination

-64.47 mas/yr

Galactic Cartesian (pc)

x = -0.545 · y = -0.740 · z = -0.395

Equatorial (J2000)

RA 233.62473° · Dec -23.25947°

Galactic ℓ, b

344.826° · 26.054°

Ecliptic λ, β

236.894° · -3.903°

HTM-20 index

2009049066