Key parameters at a glance

A radius of 2.21 Earth radii
A mass of 5.52 Earth masses
Surface gravity around 1.13 g
An orbital period of 12.283 days
Equilibrium temperature 949 K (676 °C)
Distance from Earth 1,819.93 light-years
Earth Similarity Index 0.277
Travel time at Voyager 1 speed 32,094,422 years

K2-335 b Planet Profile

Physical Specs

Radius

2.21 R⊕

Radius (Jupiter)

0.197 R♃

Mass

5.52 M⊕

Mass (Jupiter)

0.017 M♃

Density

2.81 g/cm³

Surface Gravity

1.13 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.277

HZ Position Unknown

Controversial No

Discovery

Year 2021

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1658of 1978

top 83.8%

This planet

2.21R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

OGLE-2005-BLG-390L b 2.21 R⊕ K2-275 c 2.21 R⊕ Kepler-989 b 2.21 R⊕

Metric	Earth	K2-335 b	Jupiter
Radius (R⊕)	1.00	2.21	11.21
Mass (M⊕)	1.00	5.52	317.83
Density (g/cm³)	5.51	2.81	1.33
Surface Gravity (g)	1.00	1.13	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 21247758

Gaia DR2

Gaia DR2 658060049982487040

Gaia DR3

Gaia DR3 658060049982487040

System

K2-335

Percentile among Sub-Neptune cohort

Radius 2.210 R⊕ · percentile 16 / cohort 1978

Mass 5.520 M⊕ · percentile 16 / cohort 1978

Orbital period 12.28 d · percentile 42 / cohort 1946

Distance 557.99 pc · percentile 50 / cohort 1975

ESI 0.277 · percentile 22 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

12.283 days

Semi-major axis

— AU

Eccentricity

—

Inclination

88.51 °

Year Length

A year here lasts approximately 12.28 Earth days (3.4% of a terrestrial year).

Transit Fingerprint

Depth

0.031 %

Duration

4.310 h

Impact parameter b

0.400

Rp / R★

0.015100

Transit midpoint (BJD)

2,457,148.2096

Photometric dip

Transit produces a flux drop of 314 ppm lasting ≈ 4.31 h.

Extended Orbital Architecture

Planet / star radius ratio

0.015100

Semi-major axis / stellar radius

20.300

Impact parameter (b)

0.400

Transit mid-time (BJD)

2,457,148.2096

Eq. Temperature

949K

(676 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.277

0 = alien, 1 = Earth-identical

Insufficient insolation data — 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: K2-335

Spectral Class

F-type yellow-white

Effective Temperature

6,222 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.330 R☉

Stellar Mass

1.230 M☉

Metallicity [Fe/H]

0.10

Extended Stellar Properties

Surface gravity (log g)

4.280 dex

Stellar density

0.723 g/cm³

Metallicity ratio

[Fe/H]

Distance

557.99 parsec

Light-years 1,819.93 ly

V-band magnitude

12.56 mag

Voyager-speed travel 32,094,422 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

1.764 mas

Total Proper Motion

11.145 mas/yr

PM Right Ascension

-7.19 mas/yr

PM Declination

-8.51 mas/yr

Galactic Cartesian (pc)

x = -0.608 · y = 0.741 · z = 0.284

Equatorial (J2000)

RA 129.38967° · Dec 16.52206°

Galactic ℓ, b

209.075° · 30.717°

Ecliptic λ, β

127.494° · -1.938°

HTM-20 index

-1693137611