Key parameters at a glance

A radius of 5.65 Earth radii
A mass of 27.20 Earth masses
Surface gravity around 0.85 g
An orbital period of 5.114 days
Equilibrium temperature 1,380 K (1107 °C)
Distance from Earth 1,212.72 light-years
Earth Similarity Index 0.123
Travel time at Voyager 1 speed 21,386,369 years

K2-334 b Planet Profile

Physical Specs

Radius

5.65 R⊕

Radius (Jupiter)

0.504 R♃

Mass

27.20 M⊕

Mass (Jupiter)

0.085 M♃

Density

0.83 g/cm³

Surface Gravity

0.85 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.123

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#306of 574

top 53.1%

This planet

5.65R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

TOI-1883 b 5.65 R⊕ TIC 434398831 c 5.63 R⊕ TOI-1410 c 5.63 R⊕

Metric	Earth	K2-334 b	Jupiter
Radius (R⊕)	1.00	5.65	11.21
Mass (M⊕)	1.00	27.20	317.83
Density (g/cm³)	5.51	0.83	1.33
Surface Gravity (g)	1.00	0.85	2.53
Insolation (S⊕)	1.00	832.23	0.037

Star Catalogue Identifiers

TIC

TIC 330687113

Gaia DR2

Gaia DR2 610858393758591104

Gaia DR3

Gaia DR3 610858393758591104

System

K2-334

Percentile among Neptune-like cohort

Radius 5.650 R⊕ · percentile 47 / cohort 574

Mass 27.200 M⊕ · percentile 45 / cohort 574

Orbital period 5.11 d · percentile 21 / cohort 524

Distance 371.82 pc · percentile 52 / cohort 572

ESI 0.123 · percentile 6 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

5.114 days

Semi-major axis

— AU

Eccentricity

—

Inclination

88.58 °

Year Length

A year here lasts approximately 5.11 Earth days (1.4% of a terrestrial year).

Transit Fingerprint

Depth

0.129 %

Duration

2.460 h

Impact parameter b

0.380

Rp / R★

0.034300

Transit midpoint (BJD)

2,458,096.8102

Photometric dip

Transit produces a flux drop of 1,290 ppm lasting ≈ 2.46 h.

Extended Orbital Architecture

Planet / star radius ratio

0.034300

Semi-major axis / stellar radius

15.350

Impact parameter (b)

0.380

Transit mid-time (BJD)

2,458,096.8102

Eq. Temperature

1,380K

(1107 °C)

Insolation (S⊕)

832.23

Earth = 1.00

Earth Similarity (ESI)

0.123

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Discovery Paper

Primary reference

De Leon et al. 2021

Instrument

Kepler CCD Array

Publication

2021-08

Observation locale

Space

Discovery cohort

Planets confirmed in 2021 at K2 (12 shown).

EPIC 220492298 b · Rocky Terrestrial EPIC 206042996 c · Rocky Terrestrial EPIC 212624936 b · Rocky Terrestrial EPIC 206024342 c · Super-Earth EPIC 201427007 b · Super-Earth K2-332 b · Sub-Neptune EPIC 212624936 c · Sub-Neptune EPIC 206024342 d · Sub-Neptune K2-345 b · Sub-Neptune K2-349 b · Super-Earth K2-343 c · Sub-Neptune K2-346 b · Sub-Neptune

Host System: K2-334

Spectral Class

F-type yellow-white

Effective Temperature

6,502 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.490 R☉

Stellar Mass

1.360 M☉

Metallicity [Fe/H]

0.17

Extended Stellar Properties

Surface gravity (log g)

4.220 dex

Stellar density

0.509 g/cm³

Metallicity ratio

[Fe/H]

Distance

371.82 parsec

Light-years 1,212.72 ly

V-band magnitude

11.84 mag

Voyager-speed travel 21,386,369 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

2.661 mas

Total Proper Motion

13.278 mas/yr

PM Right Ascension

-9.24 mas/yr

PM Declination

-9.54 mas/yr

Galactic Cartesian (pc)

x = -0.696 · y = 0.661 · z = 0.281

Equatorial (J2000)

RA 136.48943° · Dec 16.32551°

Galactic ℓ, b

212.371° · 36.956°

Ecliptic λ, β

134.104° · -0.282°

HTM-20 index

-300592463