Key parameters at a glance

A radius of 0.86 Earth radii
A mass of 0.57 Earth masses
Surface gravity around 0.77 g
An orbital period of 0.570 days
Distance from Earth 575.70 light-years
Earth Similarity Index 0.939
Travel time at Voyager 1 speed 10,152,433 years

K2-210 b Planet Profile

Physical Specs

Radius

0.86 R⊕

Radius (Jupiter)

0.077 R♃

Mass

0.57 M⊕

Mass (Jupiter)

0.002 M♃

Density

4.89 g/cm³

Surface Gravity

0.77 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.939

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

#444of 570

top 77.7%

This planet

0.86R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1361 b 0.86 R⊕ Kepler-352 b 0.86 R⊕ Kepler-107 d 0.86 R⊕

Metric	Earth	K2-210 b	Jupiter
Radius (R⊕)	1.00	0.86	11.21
Mass (M⊕)	1.00	0.57	317.83
Density (g/cm³)	5.51	4.89	1.33
Surface Gravity (g)	1.00	0.77	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 388801714

Gaia DR2

Gaia DR2 2538051863476537984

Gaia DR3

Gaia DR3 2538051863476537984

System

K2-210

Percentile among Rocky Terrestrial cohort

Radius 0.860 R⊕ · percentile 21 / cohort 570

Mass 0.566 M⊕ · percentile 17 / cohort 570

Orbital period 0.57 d · percentile 3 / cohort 567

Distance 176.51 pc · percentile 30 / cohort 566

ESI 0.939 · percentile 92 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

0.570 days

Semi-major axis

— AU

Eccentricity

—

Inclination

89.20 °

Year Length

A year here lasts roughly 13.7 hours long.

Transit Fingerprint

Rp / R★

0.008740

Transit midpoint (BJD)

2,457,465.8038

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.939

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).

K2-190 c · Rocky Terrestrial K2-183 b · Rocky Terrestrial K2-209 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: K2-210

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,500 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.890 R☉

Stellar Mass

0.912 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.600 dex

Stellar density

1.942 g/cm³

Systemic radial velocity

0.09 km/s

Metallicity ratio

[Fe/H]

Distance

176.51 parsec

Light-years 575.70 ly

V-band magnitude

11.54 mag

Voyager-speed travel 10,152,433 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

5.637 mas

Total Proper Motion

77.614 mas/yr

PM Right Ascension

70.75 mas/yr

PM Declination

31.92 mas/yr

Galactic Cartesian (pc)

x = 0.953 · y = 0.303 · z = 0.028

Equatorial (J2000)

RA 17.64127° · Dec 1.57841°

Galactic ℓ, b

132.806° · -60.926°

Ecliptic λ, β

16.867° · -5.465°

HTM-20 index

-1407329940