Key parameters at a glance

A radius of 2.36 Earth radii
A mass of 6.16 Earth masses
Surface gravity around 1.11 g
An orbital period of 15.937 days
Distance from Earth 606.48 light-years
Earth Similarity Index 0.725
Travel time at Voyager 1 speed 10,695,227 years

K2-366 b Planet Profile

Physical Specs

Radius

2.36 R⊕

Radius (Jupiter)

0.210 R♃

Mass

6.16 M⊕

Mass (Jupiter)

0.019 M♃

Density

2.58 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.725

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

#1409of 1978

top 71.2%

This planet

2.36R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-184 b 2.36 R⊕ Kepler-1022 b 2.36 R⊕ Kepler-482 b 2.36 R⊕

Metric	Earth	K2-366 b	Jupiter
Radius (R⊕)	1.00	2.36	11.21
Mass (M⊕)	1.00	6.16	317.83
Density (g/cm³)	5.51	2.58	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 49512708

Gaia DR2

Gaia DR2 6245607576304205952

Gaia DR3

Gaia DR3 6245607576304205952

System

K2-366

Percentile among Sub-Neptune cohort

Radius 2.359 R⊕ · percentile 29 / cohort 1978

Mass 6.160 M⊕ · percentile 28 / cohort 1978

Orbital period 15.94 d · percentile 53 / cohort 1946

Distance 185.95 pc · percentile 28 / cohort 1975

ESI 0.725 · percentile 95 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

15.937 days

Semi-major axis

— AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 15.94 Earth days (4.4% of a terrestrial year).

Transit Fingerprint

Depth

0.059 %

Duration

3.288 h

Impact parameter b

0.718

Rp / R★

0.022800

Transit midpoint (BJD)

2,456,906.4351

Photometric dip

Transit produces a flux drop of 590 ppm lasting ≈ 3.29 h.

Extended Orbital Architecture

Planet / star radius ratio

0.022800

Semi-major axis / stellar radius

27.630

Impact parameter (b)

0.718

Transit mid-time (BJD)

2,456,906.4351

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.725

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: K2-366

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,601 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.940 R☉

Stellar Mass

0.825 M☉

Metallicity [Fe/H]

-0.22

Extended Stellar Properties

Surface gravity (log g)

4.406 dex

Stellar density

2.013 g/cm³

Metallicity ratio

[Fe/H]

Distance

185.95 parsec

Light-years 606.48 ly

V-band magnitude

12.64 mag

Voyager-speed travel 10,695,227 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

5.357 mas

Total Proper Motion

67.306 mas/yr

PM Right Ascension

-3.95 mas/yr

PM Declination

-67.19 mas/yr

Galactic Cartesian (pc)

x = -0.418 · y = -0.846 · z = -0.331

Equatorial (J2000)

RA 243.68009° · Dec -19.34688°

Galactic ℓ, b

355.166° · 22.299°

Ecliptic λ, β

245.252° · 1.860°

HTM-20 index

1998176434