Key parameters at a glance

A radius of 2.77 Earth radii
A mass of 8.10 Earth masses
Surface gravity around 1.06 g
An orbital period of 13.775 days
Equilibrium temperature 969 K (696 °C)
Distance from Earth 522.26 light-years
Earth Similarity Index 0.249
Travel time at Voyager 1 speed 9,210,007 years

K2-330 b Planet Profile

Physical Specs

Radius

2.77 R⊕

Radius (Jupiter)

0.247 R♃

Mass

8.10 M⊕

Mass (Jupiter)

0.026 M♃

Density

2.09 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.249

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

#780of 1978

top 39.4%

This planet

2.77R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-251 c 2.77 R⊕ Kepler-251 d 2.77 R⊕ TOI-444 b 2.77 R⊕

Metric	Earth	K2-330 b	Jupiter
Radius (R⊕)	1.00	2.77	11.21
Mass (M⊕)	1.00	8.10	317.83
Density (g/cm³)	5.51	2.09	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	114.93	0.037

Star Catalogue Identifiers

TIC

TIC 366484980

Gaia DR2

Gaia DR2 601159910928534144

Gaia DR3

Gaia DR3 601159910928534144

System

K2-330

Percentile among Sub-Neptune cohort

Radius 2.770 R⊕ · percentile 60 / cohort 1978

Mass 8.100 M⊕ · percentile 55 / cohort 1978

Orbital period 13.77 d · percentile 47 / cohort 1946

Distance 160.13 pc · percentile 26 / cohort 1975

ESI 0.249 · percentile 16 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

13.775 days

Semi-major axis

— AU

Eccentricity

—

Inclination

88.63 °

Year Length

A year here lasts approximately 13.77 Earth days (3.8% of a terrestrial year).

Transit Fingerprint

Depth

0.031 %

Duration

4.570 h

Impact parameter b

0.380

Rp / R★

0.016900

Transit midpoint (BJD)

2,457,151.0642

Photometric dip

Transit produces a flux drop of 309 ppm lasting ≈ 4.57 h.

Extended Orbital Architecture

Planet / star radius ratio

0.016900

Semi-major axis / stellar radius

21.760

Impact parameter (b)

0.380

Transit mid-time (BJD)

2,457,151.0642

Eq. Temperature

969K

(696 °C)

Insolation (S⊕)

114.93

Earth = 1.00

Earth Similarity (ESI)

0.249

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: K2-330

Spectral Class

F-type yellow-white

Effective Temperature

6,232 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.500 R☉

Stellar Mass

1.230 M☉

Metallicity [Fe/H]

-0.03

Extended Stellar Properties

Surface gravity (log g)

4.180 dex

Stellar density

0.543 g/cm³

Metallicity ratio

[Fe/H]

Distance

160.13 parsec

Light-years 522.26 ly

V-band magnitude

9.61 mag

Voyager-speed travel 9,210,007 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

6.217 mas

Total Proper Motion

28.567 mas/yr

PM Right Ascension

-24.89 mas/yr

PM Declination

-14.03 mas/yr

Galactic Cartesian (pc)

x = -0.588 · y = 0.783 · z = 0.202

Equatorial (J2000)

RA 126.89683° · Dec 11.66741°

Galactic ℓ, b

213.055° · 26.567°

Ecliptic λ, β

126.345° · -7.238°

HTM-20 index

23296268