Key parameters at a glance

A radius of 1.09 Earth radii
A mass of 1.34 Earth masses
Surface gravity around 1.12 g
An orbital period of 21.574 days
Distance from Earth 524.06 light-years
Earth Similarity Index 0.975
Travel time at Voyager 1 speed 9,241,872 years

1 sibling around K2-190

K2-190 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
K2-190 b	Super-Earth	1.36	2.41	10.099	—	2018
K2-190 c this	Rocky Terrestrial	1.09	1.34	21.574	—	2018

K2-190 c Planet Profile

Physical Specs

Radius

1.09 R⊕

Radius (Jupiter)

0.098 R♃

Mass

1.34 M⊕

Mass (Jupiter)

0.004 M♃

Density

5.64 g/cm³

Surface Gravity

1.12 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.975

HZ Position Unknown

Controversial No

Discovery

Year 2018

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#238of 570

top 41.6%

This planet

1.09R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1909 b 1.09 R⊕ TOI-5720 b 1.09 R⊕ Kepler-212 b 1.09 R⊕

Metric	Earth	K2-190 c	Jupiter
Radius (R⊕)	1.00	1.09	11.21
Mass (M⊕)	1.00	1.34	317.83
Density (g/cm³)	5.51	5.64	1.33
Surface Gravity (g)	1.00	1.12	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 392469577

Gaia DR2

Gaia DR2 3607243530404017280

Gaia DR3

Gaia DR3 3607243530404017280

System

K2-190

Percentile among Rocky Terrestrial cohort

Radius 1.093 R⊕ · percentile 58 / cohort 570

Mass 1.340 M⊕ · percentile 53 / cohort 570

Orbital period 21.57 d · percentile 93 / cohort 567

Distance 160.68 pc · percentile 28 / cohort 566

ESI 0.975 · percentile 96 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

21.574 days

Semi-major axis

— AU

Eccentricity

—

Inclination

88.98 °

Year Length

A year here lasts approximately 21.57 Earth days (5.9% of a terrestrial year).

Transit Fingerprint

Rp / R★

0.010986

Transit midpoint (BJD)

2,457,228.6926

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.975

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Mayo et al. 2018

Instrument

Kepler CCD Array

Publication

2018-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2018 at K2 (12 shown).

K2-183 b · Rocky Terrestrial K2-209 b · Rocky Terrestrial K2-210 b · Rocky Terrestrial K2-165 b · Super-Earth K2-169 b · Super-Earth K2-148 b · Super-Earth K2-219 b · Super-Earth K2-190 b · Super-Earth K2-200 b · Super-Earth K2-201 b · Super-Earth K2-170 b · Super-Earth K2-219 c · Super-Earth

Host System: K2-190

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,631 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.912 R☉

Stellar Mass

0.905 M☉

Metallicity [Fe/H]

-0.19

Extended Stellar Properties

Surface gravity (log g)

4.380 dex

Stellar density

1.482 g/cm³

Systemic radial velocity

-10.64 km/s

Metallicity ratio

[Fe/H]

Distance

160.68 parsec

Light-years 524.06 ly

V-band magnitude

11.14 mag

Voyager-speed travel 9,241,872 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

6.195 mas

Total Proper Motion

114.871 mas/yr

PM Right Ascension

-114.26 mas/yr

PM Declination

11.88 mas/yr

Galactic Cartesian (pc)

x = -0.880 · y = -0.417 · z = -0.228

Equatorial (J2000)

RA 205.36305° · Dec -13.16087°

Galactic ℓ, b

321.268° · 47.922°

Ecliptic λ, β

208.270° · -2.464°

HTM-20 index

1010960487