Key parameters at a glance

A radius of 2.43 Earth radii
A mass of 6.48 Earth masses
Surface gravity around 1.10 g
An orbital period of 3.262 days
Semi-major axis 0.0331 AU
Equilibrium temperature 707 K (434 °C)
Distance from Earth 445.75 light-years
Earth Similarity Index 0.362
Travel time at Voyager 1 speed 7,860,759 years
Almost certainly tidally locked to its host star given the close orbit

K2-324 b Planet Profile

Physical Specs

Radius

2.43 R⊕

Radius (Jupiter)

0.217 R♃

Mass

6.48 M⊕

Mass (Jupiter)

0.020 M♃

Density

2.48 g/cm³

Surface Gravity

1.10 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.362

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

#1281of 1978

top 64.7%

This planet

2.43R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-233 b 2.43 R⊕ Kepler-55 b 2.43 R⊕ TOI-4184 b 2.43 R⊕

Metric	Earth	K2-324 b	Jupiter
Radius (R⊕)	1.00	2.43	11.21
Mass (M⊕)	1.00	6.48	317.83
Density (g/cm³)	5.51	2.48	1.33
Surface Gravity (g)	1.00	1.10	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 392817207

Gaia DR2

Gaia DR2 3862378262961788288

Gaia DR3

Gaia DR3 3862378262961788288

System

K2-324

Percentile among Sub-Neptune cohort

Radius 2.430 R⊕ · percentile 35 / cohort 1978

Mass 6.480 M⊕ · percentile 33 / cohort 1978

Orbital period 3.26 d · percentile 6 / cohort 1946

Distance 136.67 pc · percentile 24 / cohort 1975

ESI 0.362 · percentile 43 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

3.262 days

Semi-major axis

0.0331 AU

Eccentricity

—

Inclination

88.33 °

Year Length

A year here lasts approximately 3.26 Earth days (0.9% of a terrestrial year) at a mean orbital distance of 0.0331 AU.

Transit Fingerprint

Depth

0.199 %

Impact parameter b

0.420

Transit midpoint (BJD)

2,457,909.1460

Photometric dip

Transit produces a flux drop of 1,990 ppm.

Eq. Temperature

707K

(434 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.362

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 K2-318 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 K2-320 b · Sub-Neptune

Host System: K2-324

Spectral Class

K-type orange

Effective Temperature

3,752 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.505 R☉

Stellar Mass

0.517 M☉

Metallicity [Fe/H]

—

Distance

136.67 parsec

Light-years 445.75 ly

V-band magnitude

15.22 mag

Voyager-speed travel 7,860,759 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

7.290 mas

Total Proper Motion

17.992 mas/yr

PM Right Ascension

-17.14 mas/yr

PM Declination

-5.46 mas/yr

Galactic Cartesian (pc)

x = -0.918 · y = 0.378 · z = 0.120

Equatorial (J2000)

RA 157.62222° · Dec 6.86367°

Galactic ℓ, b

237.626° · 50.914°

Ecliptic λ, β

156.752° · -2.333°

HTM-20 index

1261881144

Similar Worlds

Kepler-1526 b

Sub-Neptune · K-type orange

Radius 2.43 R⊕ · 1,812.0 ly

Kepler-55 b

Sub-Neptune · K-type orange

Radius 2.43 R⊕ · 1,887.8 ly

Kepler-786 b

Sub-Neptune · K-type orange

Radius 2.43 R⊕ · 1,582.9 ly

TOI-904 b

Sub-Neptune · K-type orange

Radius 2.43 R⊕ · 150.3 ly

Kepler-1716 b

Sub-Neptune · K-type orange

Radius 2.42 R⊕ · 637.4 ly

Kepler-1858 b

Sub-Neptune · K-type orange

Radius 2.42 R⊕ · 2,717.1 ly

Explore Related Categories

Sub-Neptune Planets Transit Discoveries K2 Mission K-type orange Hosts