Key parameters at a glance

A radius of 2.06 Earth radii
A mass of 4.90 Earth masses
Surface gravity around 1.15 g
An orbital period of 11.021 days
Distance from Earth 748.75 light-years
Earth Similarity Index 0.775
Travel time at Voyager 1 speed 13,204,145 years

K2-373 b Planet Profile

Physical Specs

Radius

2.06 R⊕

Radius (Jupiter)

0.184 R♃

Mass

4.90 M⊕

Mass (Jupiter)

0.015 M♃

Density

3.08 g/cm³

Surface Gravity

1.15 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.775

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

#1874of 1978

top 94.7%

This planet

2.06R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-377 c 2.06 R⊕ TOI-1670 b 2.06 R⊕ K2-117 c 2.06 R⊕

Metric	Earth	K2-373 b	Jupiter
Radius (R⊕)	1.00	2.06	11.21
Mass (M⊕)	1.00	4.90	317.83
Density (g/cm³)	5.51	3.08	1.33
Surface Gravity (g)	1.00	1.15	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 27626711

Gaia DR2

Gaia DR2 650623262571412480

Gaia DR3

Gaia DR3 650623262571412480

System

K2-373

Percentile among Sub-Neptune cohort

Radius 2.061 R⊕ · percentile 5 / cohort 1978

Mass 4.900 M⊕ · percentile 6 / cohort 1978

Orbital period 11.02 d · percentile 38 / cohort 1946

Distance 229.57 pc · percentile 31 / cohort 1975

ESI 0.775 · percentile 99 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

11.021 days

Semi-major axis

— AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 11.02 Earth days (3.0% of a terrestrial year).

Transit Fingerprint

Depth

0.020 %

Duration

4.320 h

Impact parameter b

0.666

Rp / R★

0.012700

Transit midpoint (BJD)

2,457,150.2894

Photometric dip

Transit produces a flux drop of 202 ppm lasting ≈ 4.32 h.

Extended Orbital Architecture

Planet / star radius ratio

0.012700

Semi-major axis / stellar radius

15.290

Impact parameter (b)

0.666

Transit mid-time (BJD)

2,457,150.2894

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.775

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: K2-373

Spectral Class

F-type yellow-white

Effective Temperature

6,138 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.486 R☉

Stellar Mass

1.158 M☉

Metallicity [Fe/H]

0.05

Extended Stellar Properties

Surface gravity (log g)

4.156 dex

Stellar density

0.431 g/cm³

Metallicity ratio

[Fe/H]

Distance

229.57 parsec

Light-years 748.75 ly

V-band magnitude

10.47 mag

Voyager-speed travel 13,204,145 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

4.328 mas

Total Proper Motion

9.068 mas/yr

PM Right Ascension

3.21 mas/yr

PM Declination

8.48 mas/yr

Galactic Cartesian (pc)

x = -0.531 · y = 0.814 · z = 0.237

Equatorial (J2000)

RA 123.13615° · Dec 13.68850°

Galactic ℓ, b

209.348° · 24.053°

Ecliptic λ, β

122.282° · -6.114°

HTM-20 index

-709146767