Key parameters at a glance

A radius of 2.07 Earth radii
A mass of 4.95 Earth masses
Surface gravity around 1.15 g
An orbital period of 21.700 days
Distance from Earth 908.06 light-years
Earth Similarity Index 0.773
Travel time at Voyager 1 speed 16,013,592 years

K2-382 b Planet Profile

Physical Specs

Radius

2.07 R⊕

Radius (Jupiter)

0.185 R♃

Mass

4.95 M⊕

Mass (Jupiter)

0.016 M♃

Density

3.06 g/cm³

Surface Gravity

1.15 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.773

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

#1858of 1978

top 93.9%

This planet

2.07R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

HD 108236 c 2.07 R⊕ TOI-262 b 2.07 R⊕ Kepler-654 b 2.07 R⊕

Metric	Earth	K2-382 b	Jupiter
Radius (R⊕)	1.00	2.07	11.21
Mass (M⊕)	1.00	4.95	317.83
Density (g/cm³)	5.51	3.06	1.33
Surface Gravity (g)	1.00	1.15	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 187960878

Gaia DR2

Gaia DR2 4083952670840373504

Gaia DR3

Gaia DR3 4083952670840373504

System

K2-382

Percentile among Sub-Neptune cohort

Radius 2.072 R⊕ · percentile 6 / cohort 1978

Mass 4.950 M⊕ · percentile 7 / cohort 1978

Orbital period 21.70 d · percentile 65 / cohort 1946

Distance 278.41 pc · percentile 33 / cohort 1975

ESI 0.773 · percentile 99 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

21.700 days

Semi-major axis

— AU

Eccentricity

—

Inclination

88.30 °

Year Length

A year here lasts approximately 21.70 Earth days (5.9% of a terrestrial year).

Transit Fingerprint

Depth

0.079 %

Duration

4.104 h

Impact parameter b

0.346

Rp / R★

0.023400

Transit midpoint (BJD)

2,457,314.3647

Photometric dip

Transit produces a flux drop of 789 ppm lasting ≈ 4.10 h.

Extended Orbital Architecture

Planet / star radius ratio

0.023400

Semi-major axis / stellar radius

40.810

Impact parameter (b)

0.346

Transit mid-time (BJD)

2,457,314.3647

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.773

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: K2-382

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,452 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.811 R☉

Stellar Mass

0.922 M☉

Metallicity [Fe/H]

-0.03

Extended Stellar Properties

Surface gravity (log g)

4.585 dex

Stellar density

2.298 g/cm³

Metallicity ratio

[Fe/H]

Distance

278.41 parsec

Light-years 908.06 ly

V-band magnitude

12.98 mag

Voyager-speed travel 16,013,592 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

3.564 mas

Total Proper Motion

8.312 mas/yr

PM Right Ascension

-8.28 mas/yr

PM Declination

0.72 mas/yr

Galactic Cartesian (pc)

x = 0.282 · y = -0.899 · z = -0.336

Equatorial (J2000)

RA 287.41253° · Dec -19.62693°

Galactic ℓ, b

17.179° · -12.692°

Ecliptic λ, β

286.388° · 2.827°

HTM-20 index

1680572735