Key parameters at a glance

A radius of 2.28 Earth radii
A mass of 5.82 Earth masses
Surface gravity around 1.12 g
An orbital period of 1.256 days
Semi-major axis 0.0198 AU
Equilibrium temperature 1,114 K (841 °C)
Distance from Earth 920.76 light-years
Earth Similarity Index 0.230
Travel time at Voyager 1 speed 16,237,681 years
Almost certainly tidally locked to its host star given the close orbit

K2-326 b Planet Profile

Physical Specs

Radius

2.28 R⊕

Radius (Jupiter)

0.203 R♃

Mass

5.82 M⊕

Mass (Jupiter)

0.018 M♃

Density

2.70 g/cm³

Surface Gravity

1.12 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.230

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

#1536of 1978

top 77.6%

This planet

2.28R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

GJ 806 c 2.28 R⊕ Kepler-1020 b 2.28 R⊕ DMPP-6 b 2.28 R⊕

Metric	Earth	K2-326 b	Jupiter
Radius (R⊕)	1.00	2.28	11.21
Mass (M⊕)	1.00	5.82	317.83
Density (g/cm³)	5.51	2.70	1.33
Surface Gravity (g)	1.00	1.12	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 422487869

Gaia DR2

Gaia DR2 2645727449501559680

Gaia DR3

Gaia DR3 2645727449501559680

System

K2-326

Percentile among Sub-Neptune cohort

Radius 2.280 R⊕ · percentile 22 / cohort 1978

Mass 5.820 M⊕ · percentile 22 / cohort 1978

Orbital period 1.26 d · percentile 1 / cohort 1946

Distance 282.31 pc · percentile 34 / cohort 1975

ESI 0.230 · percentile 12 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

1.256 days

Semi-major axis

0.0198 AU

Eccentricity

—

Inclination

85.63 °

Year Length

A year here lasts approximately 1.26 Earth days (0.3% of a terrestrial year) at a mean orbital distance of 0.0198 AU.

Transit Fingerprint

Depth

0.092 %

Impact parameter b

0.480

Transit midpoint (BJD)

2,457,739.0450

Photometric dip

Transit produces a flux drop of 921 ppm.

Eq. Temperature

1,114K

(841 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.230

0 = alien, 1 = Earth-identical

Insufficient insolation data — the dayside is scorched. 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 K2-324 b · Sub-Neptune

Host System: K2-326

Spectral Class

K-type orange

Effective Temperature

3,924 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.688 R☉

Stellar Mass

0.507 M☉

Metallicity [Fe/H]

—

Distance

282.31 parsec

Light-years 920.76 ly

V-band magnitude

15.98 mag

Voyager-speed travel 16,237,681 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

3.514 mas

Total Proper Motion

22.670 mas/yr

PM Right Ascension

22.32 mas/yr

PM Declination

3.96 mas/yr

Galactic Cartesian (pc)

x = 0.989 · y = -0.146 · z = 0.023

Equatorial (J2000)

RA 351.61226° · Dec 1.33759°

Galactic ℓ, b

83.822° · -54.947°

Ecliptic λ, β

352.821° · 4.556°

HTM-20 index

-399335367

Similar Worlds

Kepler-250 c

Sub-Neptune · K-type orange

Radius 2.28 R⊕ · 2,480.7 ly

Kepler-861 b

Sub-Neptune · K-type orange

Radius 2.28 R⊕ · 2,773.4 ly

Kepler-1712 b

Sub-Neptune · K-type orange

Radius 2.28 R⊕ · 509.7 ly

Kepler-1503 b

Sub-Neptune · K-type orange

Radius 2.27 R⊕ · 3,997.3 ly

Kepler-306 e

Sub-Neptune · K-type orange

Radius 2.27 R⊕ · 2,529.9 ly

EPIC 212297394 c

Sub-Neptune · K-type orange

Radius 2.27 R⊕ · 1,364.6 ly

Explore Related Categories

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