Key parameters at a glance

A radius of 2.10 Earth radii
A mass of 5.06 Earth masses
Surface gravity around 1.15 g
An orbital period of 24.930 days
Semi-major axis 0.1275 AU
Equilibrium temperature 318 K (45 °C)
Distance from Earth 385.90 light-years
Earth Similarity Index 0.764
Travel time at Voyager 1 speed 6,805,368 years
Almost certainly tidally locked to its host star given the close orbit

K2-323 b Planet Profile

Physical Specs

Radius

2.10 R⊕

Radius (Jupiter)

0.187 R♃

Mass

5.06 M⊕

Mass (Jupiter)

0.016 M♃

Density

3.00 g/cm³

Surface Gravity

1.15 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.764

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

#1818of 1978

top 91.9%

This planet

2.10R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-5734 b 2.10 R⊕ Kepler-52 b 2.10 R⊕ Kepler-360 c 2.10 R⊕

Metric	Earth	K2-323 b	Jupiter
Radius (R⊕)	1.00	2.10	11.21
Mass (M⊕)	1.00	5.06	317.83
Density (g/cm³)	5.51	3.00	1.33
Surface Gravity (g)	1.00	1.15	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 392852196

Gaia DR2

Gaia DR2 3859431674878660864

Gaia DR3

Gaia DR3 3859431674878660864

System

K2-323

Percentile among Sub-Neptune cohort

Radius 2.100 R⊕ · percentile 7 / cohort 1978

Mass 5.060 M⊕ · percentile 9 / cohort 1978

Orbital period 24.93 d · percentile 69 / cohort 1946

Distance 118.32 pc · percentile 23 / cohort 1975

ESI 0.764 · percentile 98 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

24.930 days

Semi-major axis

0.1275 AU

Eccentricity

—

Inclination

89.88 °

Year Length

A year here lasts approximately 24.93 Earth days (6.8% of a terrestrial year) at a mean orbital distance of 0.1275 AU.

Transit Fingerprint

Depth

0.263 %

Impact parameter b

0.140

Transit midpoint (BJD)

2,457,914.2510

Photometric dip

Transit produces a flux drop of 2,630 ppm.

Eq. Temperature

318K

(45 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.764

0 = alien, 1 = Earth-identical

Insufficient insolation data — liquid water is physically possible with adequate atmospheric pressure. 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 K2-315 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 K2-324 b · Sub-Neptune K2-320 b · Sub-Neptune

Host System: K2-323

Spectral Class

K-type orange

Effective Temperature

3,710 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.549 R☉

Stellar Mass

0.478 M☉

Metallicity [Fe/H]

—

Distance

118.32 parsec

Light-years 385.90 ly

V-band magnitude

14.94 mag

Voyager-speed travel 6,805,368 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

8.423 mas

Total Proper Motion

20.590 mas/yr

PM Right Ascension

-11.16 mas/yr

PM Declination

-17.30 mas/yr

Galactic Cartesian (pc)

x = -0.931 · y = 0.349 · z = 0.109

Equatorial (J2000)

RA 159.42099° · Dec 6.28587°

Galactic ℓ, b

240.073° · 52.012°

Ecliptic λ, β

158.627° · -2.208°

HTM-20 index

1394664591

Similar Worlds

Kepler-1529 b

Sub-Neptune · K-type orange

Radius 2.10 R⊕ · 2,155.9 ly

TOI-5734 b

Sub-Neptune · K-type orange

Radius 2.10 R⊕ · 106.0 ly

K2-4 b

Sub-Neptune · K-type orange

Radius 2.10 R⊕ · 756.1 ly

EPIC 206317286 c

Sub-Neptune · K-type orange

Radius 2.09 R⊕ · 1,025.3 ly

Kepler-934 b

Sub-Neptune · K-type orange

Radius 2.09 R⊕ · 1,985.4 ly

Kepler-705 b

Sub-Neptune · K-type orange

Radius 2.11 R⊕ · 903.1 ly

Explore Related Categories

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