Key parameters at a glance

A radius of 6.18 Earth radii
A mass of 31.60 Earth masses
Surface gravity around 0.83 g
An orbital period of 14.759 days
Equilibrium temperature 826 K (553 °C)
Distance from Earth 1,121.94 light-years
Earth Similarity Index 0.207
Travel time at Voyager 1 speed 19,785,482 years

K2-333 b Planet Profile

Physical Specs

Radius

6.18 R⊕

Radius (Jupiter)

0.551 R♃

Mass

31.60 M⊕

Mass (Jupiter)

0.100 M♃

Density

0.74 g/cm³

Surface Gravity

0.83 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.207

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

#264of 574

top 45.8%

This planet

6.18R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

PH1 b 6.18 R⊕ Kepler-397 c 6.18 R⊕ TOI-4010 d 6.18 R⊕

Metric	Earth	K2-333 b	Jupiter
Radius (R⊕)	1.00	6.18	11.21
Mass (M⊕)	1.00	31.60	317.83
Density (g/cm³)	5.51	0.74	1.33
Surface Gravity (g)	1.00	0.83	2.53
Insolation (S⊕)	1.00	102.13	0.037

Star Catalogue Identifiers

TIC

TIC 330690135

Gaia DR2

Gaia DR2 607345660265955456

Gaia DR3

Gaia DR3 607345660265955456

System

K2-333

Percentile among Neptune-like cohort

Radius 6.180 R⊕ · percentile 53 / cohort 574

Mass 31.600 M⊕ · percentile 53 / cohort 574

Orbital period 14.76 d · percentile 44 / cohort 524

Distance 343.99 pc · percentile 50 / cohort 572

ESI 0.207 · percentile 29 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

14.759 days

Semi-major axis

— AU

Eccentricity

—

Inclination

89.35 °

Year Length

A year here lasts approximately 14.76 Earth days (4.0% of a terrestrial year).

Transit Fingerprint

Depth

0.224 %

Duration

4.960 h

Impact parameter b

0.260

Rp / R★

0.046100

Transit midpoint (BJD)

2,458,097.3960

Photometric dip

Transit produces a flux drop of 2,239 ppm lasting ≈ 4.96 h.

Extended Orbital Architecture

Planet / star radius ratio

0.046100

Semi-major axis / stellar radius

23.060

Impact parameter (b)

0.260

Transit mid-time (BJD)

2,458,097.3960

Eq. Temperature

826K

(553 °C)

Insolation (S⊕)

102.13

Earth = 1.00

Earth Similarity (ESI)

0.207

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

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: K2-333

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,880 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.220 R☉

Stellar Mass

1.060 M☉

Metallicity [Fe/H]

0.07

Extended Stellar Properties

Surface gravity (log g)

4.290 dex

Stellar density

0.845 g/cm³

Metallicity ratio

[Fe/H]

Distance

343.99 parsec

Light-years 1,121.94 ly

V-band magnitude

12.07 mag

Voyager-speed travel 19,785,482 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

2.879 mas

Total Proper Motion

12.428 mas/yr

PM Right Ascension

-6.00 mas/yr

PM Declination

-10.89 mas/yr

Galactic Cartesian (pc)

x = -0.703 · y = 0.661 · z = 0.262

Equatorial (J2000)

RA 136.78928° · Dec 15.20568°

Galactic ℓ, b

213.803° · 36.797°

Ecliptic λ, β

134.704° · -1.271°

HTM-20 index

325396625