Key parameters at a glance

A radius of 2.91 Earth radii
A mass of 8.78 Earth masses
Surface gravity around 1.04 g
An orbital period of 23.448 days
Distance from Earth 610.64 light-years
Earth Similarity Index 0.651
Travel time at Voyager 1 speed 10,768,561 years

K2-365 b Planet Profile

Physical Specs

Radius

2.91 R⊕

Radius (Jupiter)

0.259 R♃

Mass

8.78 M⊕

Mass (Jupiter)

0.028 M♃

Density

1.97 g/cm³

Surface Gravity

1.04 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.651

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#616of 1978

top 31.1%

This planet

2.91R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-1772.01 2.91 R⊕ K2-138 f 2.90 R⊕ Kepler-107 e 2.90 R⊕

Metric	Earth	K2-365 b	Jupiter
Radius (R⊕)	1.00	2.91	11.21
Mass (M⊕)	1.00	8.78	317.83
Density (g/cm³)	5.51	1.97	1.33
Surface Gravity (g)	1.00	1.04	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 220604190

Gaia DR2

Gaia DR2 6246622017519183616

Gaia DR3

Gaia DR3 6246622017519183616

System

K2-365

Percentile among Sub-Neptune cohort

Radius 2.906 R⊕ · percentile 69 / cohort 1978

Mass 8.780 M⊕ · percentile 63 / cohort 1978

Orbital period 23.45 d · percentile 67 / cohort 1946

Distance 187.22 pc · percentile 28 / cohort 1975

ESI 0.651 · percentile 88 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

23.448 days

Semi-major axis

— AU

Eccentricity

—

Inclination

89.00 °

Year Length

A year here lasts approximately 23.45 Earth days (6.4% of a terrestrial year).

Transit Fingerprint

Depth

0.078 %

Duration

5.712 h

Impact parameter b

0.328

Rp / R★

0.025300

Transit midpoint (BJD)

2,456,898.8326

Photometric dip

Transit produces a flux drop of 783 ppm lasting ≈ 5.71 h.

Extended Orbital Architecture

Planet / star radius ratio

0.025300

Semi-major axis / stellar radius

30.650

Impact parameter (b)

0.328

Transit mid-time (BJD)

2,456,898.8326

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.651

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Christiansen et al. 2022

Instrument

Kepler CCD Array

Publication

2022-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2022 at K2 (12 shown).

K2-411 b · Rocky Terrestrial K2-381 b · Rocky Terrestrial K2-384 b · Rocky Terrestrial K2-400 b · Rocky Terrestrial K2-384 c · Rocky Terrestrial K2-369 b · Super-Earth K2-407 b · Super-Earth K2-414 b · Rocky Terrestrial K2-368 b · Super-Earth K2-413 c · Rocky Terrestrial K2-384 e · Super-Earth K2-407 c · Super-Earth

Host System: K2-365

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,561 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.051 R☉

Stellar Mass

0.823 M☉

Metallicity [Fe/H]

-0.02

Extended Stellar Properties

Surface gravity (log g)

4.313 dex

Stellar density

1.170 g/cm³

Metallicity ratio

[Fe/H]

Distance

187.22 parsec

Light-years 610.64 ly

V-band magnitude

11.37 mag

Voyager-speed travel 10,768,561 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

5.313 mas

Total Proper Motion

23.516 mas/yr

PM Right Ascension

-11.03 mas/yr

PM Declination

-20.77 mas/yr

Galactic Cartesian (pc)

x = -0.483 · y = -0.799 · z = -0.359

Equatorial (J2000)

RA 238.81971° · Dec -21.02697°

Galactic ℓ, b

350.415° · 24.448°

Ecliptic λ, β

241.096° · -0.662°

HTM-20 index

1884033465