Key parameters at a glance

A radius of 2.68 Earth radii
A mass of 7.65 Earth masses
Surface gravity around 1.07 g
An orbital period of 11.251 days
Semi-major axis 0.0863 AU
Equilibrium temperature 888 K (615 °C)
Distance from Earth 1,566.55 light-years
Earth Similarity Index 0.276
Travel time at Voyager 1 speed 27,626,109 years

K2-358 b Planet Profile

Physical Specs

Radius

2.68 R⊕

Radius (Jupiter)

0.239 R♃

Mass

7.65 M⊕

Mass (Jupiter)

0.024 M♃

Density

2.18 g/cm³

Surface Gravity

1.07 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.276

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

#896of 1978

top 45.2%

This planet

2.68R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-487 c 2.68 R⊕ Kepler-1184 b 2.68 R⊕ K2-58 b 2.68 R⊕

Metric	Earth	K2-358 b	Jupiter
Radius (R⊕)	1.00	2.68	11.21
Mass (M⊕)	1.00	7.65	317.83
Density (g/cm³)	5.51	2.18	1.33
Surface Gravity (g)	1.00	1.07	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 197241396

Gaia DR2

Gaia DR2 660400738439361280

Gaia DR3

Gaia DR3 660400738439361280

System

K2-358

Percentile among Sub-Neptune cohort

Radius 2.680 R⊕ · percentile 54 / cohort 1978

Mass 7.650 M⊕ · percentile 50 / cohort 1978

Orbital period 11.25 d · percentile 39 / cohort 1946

Distance 480.31 pc · percentile 46 / cohort 1975

ESI 0.276 · percentile 22 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

11.251 days

Semi-major axis

0.0863 AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 11.25 Earth days (3.1% of a terrestrial year) at a mean orbital distance of 0.0863 AU.

Transit Fingerprint

Impact parameter b

0.350

Rp / R★

0.026900

Transit midpoint (BJD)

2,458,259.0094

Extended Orbital Architecture

Planet / star radius ratio

0.026900

Semi-major axis / stellar radius

20.610

Impact parameter (b)

0.350

Transit mid-time (BJD)

2,458,259.0094

Angular separation (arcsec)

0.18000

Eq. Temperature

888K

(615 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.276

0 = alien, 1 = Earth-identical

Insufficient insolation data — the surface is too hot to retain surface water.

Discovery Paper

Primary reference

Castro Gonz Aacute Lez et al. 2022

Instrument

Kepler CCD Array

Publication

2022-01

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: K2-358

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,650 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.910 R☉

Stellar Mass

0.930 M☉

Metallicity [Fe/H]

-0.07

Extended Stellar Properties

Surface gravity (log g)

4.490 dex

Stellar density

1.849 g/cm³

Metallicity ratio

[Fe/H]

Distance

480.31 parsec

Light-years 1,566.55 ly

V-band magnitude

13.70 mag

Voyager-speed travel 27,626,109 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

2.053 mas

Total Proper Motion

24.157 mas/yr

PM Right Ascension

-21.01 mas/yr

PM Declination

-11.91 mas/yr

Galactic Cartesian (pc)

x = -0.655 · y = 0.683 · z = 0.325

Equatorial (J2000)

RA 133.80811° · Dec 18.94973°

Galactic ℓ, b

208.194° · 35.518°

Ecliptic λ, β

130.913° · 1.515°

HTM-20 index

1563840091