Key parameters at a glance

A radius of 4.60 Earth radii
A mass of 19.20 Earth masses
Surface gravity around 0.91 g
An orbital period of 22.549 days
Distance from Earth 278.46 light-years
Earth Similarity Index 0.501
Travel time at Voyager 1 speed 4,910,571 years

K2-406 b Planet Profile

Physical Specs

Radius

4.60 R⊕

Radius (Jupiter)

0.411 R♃

Mass

19.20 M⊕

Mass (Jupiter)

0.060 M♃

Density

1.08 g/cm³

Surface Gravity

0.91 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.501

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

#445of 574

top 77.4%

This planet

4.60R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

KIC 9663113 b 4.60 R⊕ Kepler-223 e 4.60 R⊕ TOI-6478 b 4.60 R⊕

Metric	Earth	K2-406 b	Jupiter
Radius (R⊕)	1.00	4.60	11.21
Mass (M⊕)	1.00	19.20	317.83
Density (g/cm³)	5.51	1.08	1.33
Surface Gravity (g)	1.00	0.91	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 292202337

Gaia DR2

Gaia DR2 6214868495365748096

Gaia DR3

Gaia DR3 6214868495365748096

System

K2-406

Percentile among Neptune-like cohort

Radius 4.602 R⊕ · percentile 22 / cohort 574

Mass 19.200 M⊕ · percentile 26 / cohort 574

Orbital period 22.55 d · percentile 54 / cohort 524

Distance 85.38 pc · percentile 22 / cohort 572

ESI 0.501 · percentile 90 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

22.549 days

Semi-major axis

— AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 22.55 Earth days (6.2% of a terrestrial year).

Transit Fingerprint

Duration

4.800 h

Impact parameter b

0.544

Rp / R★

0.043900

Transit midpoint (BJD)

2,458,010.3895

Extended Orbital Architecture

Planet / star radius ratio

0.043900

Semi-major axis / stellar radius

32.150

Impact parameter (b)

0.544

Transit mid-time (BJD)

2,458,010.3895

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.501

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: K2-406

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,784 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.961 R☉

Stellar Mass

0.798 M☉

Metallicity [Fe/H]

-0.04

Extended Stellar Properties

Surface gravity (log g)

4.374 dex

Stellar density

1.566 g/cm³

Metallicity ratio

[Fe/H]

Distance

85.38 parsec

Light-years 278.46 ly

V-band magnitude

9.47 mag

Voyager-speed travel 4,910,571 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

11.685 mas

Total Proper Motion

36.431 mas/yr

PM Right Ascension

-21.42 mas/yr

PM Declination

29.47 mas/yr

Galactic Cartesian (pc)

x = -0.570 · y = -0.701 · z = -0.428

Equatorial (J2000)

RA 230.88722° · Dec -25.37061°

Galactic ℓ, b

341.190° · 25.981°

Ecliptic λ, β

234.983° · -6.560°

HTM-20 index

-1646384951