Key parameters at a glance

A radius of 3.21 Earth radii
A mass of 10.40 Earth masses
Surface gravity around 1.01 g
An orbital period of 2.141 days
Equilibrium temperature 1,267 K (994 °C)
Distance from Earth 470.32 light-years
Earth Similarity Index 0.174
Travel time at Voyager 1 speed 8,294,154 years

K2-370 b Planet Profile

Physical Specs

Radius

3.21 R⊕

Radius (Jupiter)

0.286 R♃

Mass

10.40 M⊕

Mass (Jupiter)

0.033 M♃

Density

1.73 g/cm³

Surface Gravity

1.01 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.174

HZ Position Inner

Controversial No

Discovery

Year 2022

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#345of 1978

top 17.4%

This planet

3.21R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1674 b 3.21 R⊕ K2-172 c 3.21 R⊕ MOA-2009-BLG-266L b 3.21 R⊕

Metric	Earth	K2-370 b	Jupiter
Radius (R⊕)	1.00	3.21	11.21
Mass (M⊕)	1.00	10.40	317.83
Density (g/cm³)	5.51	1.73	1.33
Surface Gravity (g)	1.00	1.01	2.53
Insolation (S⊕)	1.00	428.21	0.037

Star Catalogue Identifiers

TIC

TIC 456945304

Gaia DR2

Gaia DR2 144150720342734208

Gaia DR3

Gaia DR3 144150720342734208

System

K2-370

Percentile among Sub-Neptune cohort

Radius 3.207 R⊕ · percentile 83 / cohort 1978

Mass 10.400 M⊕ · percentile 76 / cohort 1978

Orbital period 2.14 d · percentile 2 / cohort 1946

Distance 144.20 pc · percentile 25 / cohort 1975

ESI 0.174 · percentile 4 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

2.141 days

Semi-major axis

— AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts approximately 2.14 Earth days (0.6% of a terrestrial year).

Transit Fingerprint

Depth

0.063 %

Duration

1.569 h

Impact parameter b

0.941

Rp / R★

0.030200

Transit midpoint (BJD)

2,457,822.1840

Photometric dip

Transit produces a flux drop of 628 ppm lasting ≈ 1.57 h.

Extended Orbital Architecture

Planet / star radius ratio

0.030200

Semi-major axis / stellar radius

3.660

Impact parameter (b)

0.941

Transit mid-time (BJD)

2,457,822.1840

Eq. Temperature

1,267K

(994 °C)

Insolation (S⊕)

428.21

Earth = 1.00

Earth Similarity (ESI)

0.174

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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: K2-370

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,377 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.971 R☉

Stellar Mass

0.984 M☉

Metallicity [Fe/H]

0.02

Extended Stellar Properties

Surface gravity (log g)

4.454 dex

Stellar density

1.323 g/cm³

Metallicity ratio

[Fe/H]

Distance

144.20 parsec

Light-years 470.32 ly

V-band magnitude

11.11 mag

Voyager-speed travel 8,294,154 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

6.907 mas

Total Proper Motion

43.422 mas/yr

PM Right Ascension

-33.98 mas/yr

PM Declination

-27.03 mas/yr

Galactic Cartesian (pc)

x = 0.355 · y = 0.871 · z = 0.339

Equatorial (J2000)

RA 67.82053° · Dec 19.83169°

Galactic ℓ, b

177.490° · -19.024°

Ecliptic λ, β

69.182° · -2.019°

HTM-20 index

-122567265