Key parameters at a glance

A radius of 2.73 Earth radii
A mass of 7.89 Earth masses
Surface gravity around 1.06 g
An orbital period of 9.401 days
Distance from Earth 813.12 light-years
Earth Similarity Index 0.672
Travel time at Voyager 1 speed 14,339,312 years

K2-380 b Planet Profile

Physical Specs

Radius

2.73 R⊕

Radius (Jupiter)

0.243 R♃

Mass

7.89 M⊕

Mass (Jupiter)

0.025 M♃

Density

2.13 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.672

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

#835of 1978

top 42.2%

This planet

2.73R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-436 b 2.73 R⊕ Kepler-506 b 2.73 R⊕ Kepler-221 d 2.73 R⊕

Metric	Earth	K2-380 b	Jupiter
Radius (R⊕)	1.00	2.73	11.21
Mass (M⊕)	1.00	7.89	317.83
Density (g/cm³)	5.51	2.13	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 90605642

Gaia DR2

Gaia DR2 4073600356552513280

Gaia DR3

Gaia DR3 4073600356552513280

System

K2-380

Percentile among Sub-Neptune cohort

Radius 2.729 R⊕ · percentile 58 / cohort 1978

Mass 7.890 M⊕ · percentile 53 / cohort 1978

Orbital period 9.40 d · percentile 31 / cohort 1946

Distance 249.30 pc · percentile 32 / cohort 1975

ESI 0.672 · percentile 90 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

9.401 days

Semi-major axis

— AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 9.40 Earth days (2.6% of a terrestrial year).

Transit Fingerprint

Depth

0.028 %

Duration

2.112 h

Impact parameter b

0.883

Rp / R★

0.018900

Transit midpoint (BJD)

2,457,302.9354

Photometric dip

Transit produces a flux drop of 275 ppm lasting ≈ 2.11 h.

Extended Orbital Architecture

Planet / star radius ratio

0.018900

Semi-major axis / stellar radius

15.190

Impact parameter (b)

0.883

Transit mid-time (BJD)

2,457,302.9354

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.672

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: K2-380

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,911 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.320 R☉

Stellar Mass

0.993 M☉

Metallicity [Fe/H]

-0.05

Extended Stellar Properties

Surface gravity (log g)

4.194 dex

Stellar density

0.557 g/cm³

Metallicity ratio

[Fe/H]

Distance

249.30 parsec

Light-years 813.12 ly

V-band magnitude

11.69 mag

Voyager-speed travel 14,339,312 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

3.983 mas

Total Proper Motion

30.037 mas/yr

PM Right Ascension

-4.37 mas/yr

PM Declination

-29.72 mas/yr

Galactic Cartesian (pc)

x = 0.208 · y = -0.870 · z = -0.447

Equatorial (J2000)

RA 283.43464° · Dec -26.53873°

Galactic ℓ, b

9.186° · -12.224°

Ecliptic λ, β

282.018° · -3.658°

HTM-20 index

550106754