Key parameters at a glance

A radius of 2.32 Earth radii
A mass of 5.99 Earth masses
Surface gravity around 1.11 g
An orbital period of 7.473 days
Distance from Earth 1,398.51 light-years
Earth Similarity Index 0.731
Travel time at Voyager 1 speed 24,662,687 years

K2-386 b Planet Profile

Physical Specs

Radius

2.32 R⊕

Radius (Jupiter)

0.207 R♃

Mass

5.99 M⊕

Mass (Jupiter)

0.019 M♃

Density

2.64 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.731

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

#1469of 1978

top 74.2%

This planet

2.32R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-321 c 2.32 R⊕ K2-28 b 2.32 R⊕ Kepler-1208 b 2.32 R⊕

Metric	Earth	K2-386 b	Jupiter
Radius (R⊕)	1.00	2.32	11.21
Mass (M⊕)	1.00	5.99	317.83
Density (g/cm³)	5.51	2.64	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 376879052

Gaia DR2

Gaia DR2 2576755978444329216

Gaia DR3

Gaia DR3 2576755978444329216

System

K2-386

Percentile among Sub-Neptune cohort

Radius 2.320 R⊕ · percentile 25 / cohort 1978

Mass 5.990 M⊕ · percentile 24 / cohort 1978

Orbital period 7.47 d · percentile 24 / cohort 1946

Distance 428.79 pc · percentile 43 / cohort 1975

ESI 0.731 · percentile 95 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

7.473 days

Semi-major axis

— AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 7.47 Earth days (2.0% of a terrestrial year).

Transit Fingerprint

Depth

0.066 %

Duration

3.557 h

Impact parameter b

0.246

Rp / R★

0.021900

Transit midpoint (BJD)

2,457,395.9056

Photometric dip

Transit produces a flux drop of 661 ppm lasting ≈ 3.56 h.

Extended Orbital Architecture

Planet / star radius ratio

0.021900

Semi-major axis / stellar radius

16.230

Impact parameter (b)

0.246

Transit mid-time (BJD)

2,457,395.9056

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.731

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: K2-386

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,749 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.970 R☉

Stellar Mass

0.911 M☉

Metallicity [Fe/H]

0.07

Extended Stellar Properties

Surface gravity (log g)

4.424 dex

Stellar density

1.599 g/cm³

Metallicity ratio

[Fe/H]

Distance

428.79 parsec

Light-years 1,398.51 ly

V-band magnitude

13.24 mag

Voyager-speed travel 24,662,687 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

2.304 mas

Total Proper Motion

11.888 mas/yr

PM Right Ascension

-8.15 mas/yr

PM Declination

-8.65 mas/yr

Galactic Cartesian (pc)

x = 0.942 · y = 0.312 · z = 0.122

Equatorial (J2000)

RA 18.30000° · Dec 7.01303°

Galactic ℓ, b

132.484° · -55.455°

Ecliptic λ, β

19.539° · -0.684°

HTM-20 index

2126940444