Key parameters at a glance

A radius of 2.35 Earth radii
A mass of 6.13 Earth masses
Surface gravity around 1.11 g
An orbital period of 10.413 days
Distance from Earth 867.29 light-years
Earth Similarity Index 0.726
Travel time at Voyager 1 speed 15,294,737 years

K2-393 b Planet Profile

Physical Specs

Radius

2.35 R⊕

Radius (Jupiter)

0.210 R♃

Mass

6.13 M⊕

Mass (Jupiter)

0.019 M♃

Density

2.59 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.726

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1414of 1978

top 71.4%

This planet

2.35R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-416 c 2.35 R⊕ Kepler-1842 b 2.35 R⊕ Kepler-172 b 2.35 R⊕

Metric	Earth	K2-393 b	Jupiter
Radius (R⊕)	1.00	2.35	11.21
Mass (M⊕)	1.00	6.13	317.83
Density (g/cm³)	5.51	2.59	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 279046938

Gaia DR2

Gaia DR2 2651117427299894656

Gaia DR3

Gaia DR3 2651117427299894656

System

K2-393

Percentile among Sub-Neptune cohort

Radius 2.352 R⊕ · percentile 28 / cohort 1978

Mass 6.130 M⊕ · percentile 28 / cohort 1978

Orbital period 10.41 d · percentile 36 / cohort 1946

Distance 265.91 pc · percentile 33 / cohort 1975

ESI 0.726 · percentile 95 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

10.413 days

Semi-major axis

— AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 10.41 Earth days (2.9% of a terrestrial year).

Transit Fingerprint

Impact parameter b

0.803

Rp / R★

0.020100

Transit midpoint (BJD)

2,457,739.3926

Extended Orbital Architecture

Planet / star radius ratio

0.020100

Semi-major axis / stellar radius

18.380

Impact parameter (b)

0.803

Transit mid-time (BJD)

2,457,739.3926

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.726

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Christiansen et al. 2022

Instrument

Kepler CCD Array

Publication

2022-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2022 at K2 (12 shown).

K2-411 b · Rocky Terrestrial K2-381 b · Rocky Terrestrial K2-384 b · Rocky Terrestrial K2-400 b · Rocky Terrestrial K2-384 c · Rocky Terrestrial K2-369 b · Super-Earth K2-407 b · Super-Earth K2-414 b · Rocky Terrestrial K2-368 b · Super-Earth K2-413 c · Rocky Terrestrial K2-384 e · Super-Earth K2-407 c · Super-Earth

Host System: K2-393

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,678 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.071 R☉

Stellar Mass

0.881 M☉

Metallicity [Fe/H]

0.08

Extended Stellar Properties

Surface gravity (log g)

4.321 dex

Stellar density

1.185 g/cm³

Metallicity ratio

[Fe/H]

Distance

265.91 parsec

Light-years 867.29 ly

V-band magnitude

11.84 mag

Voyager-speed travel 15,294,737 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

3.732 mas

Total Proper Motion

21.752 mas/yr

PM Right Ascension

6.19 mas/yr

PM Declination

20.85 mas/yr

Galactic Cartesian (pc)

x = 0.980 · y = -0.199 · z = -0.001

Equatorial (J2000)

RA 348.51591° · Dec -0.08210°

Galactic ℓ, b

78.068° · -54.244°

Ecliptic λ, β

349.405° · 4.467°

HTM-20 index

7989693