Key parameters at a glance

A radius of 2.47 Earth radii
A mass of 6.65 Earth masses
Surface gravity around 1.09 g
An orbital period of 6.673 days
Distance from Earth 680.13 light-years
Earth Similarity Index 0.709
Travel time at Voyager 1 speed 11,994,089 years
Almost certainly tidally locked to its host star given the close orbit

K2-163 b Planet Profile

Physical Specs

Radius

2.47 R⊕

Radius (Jupiter)

0.220 R♃

Mass

6.65 M⊕

Mass (Jupiter)

0.021 M♃

Density

2.44 g/cm³

Surface Gravity

1.09 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.709

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

#1243of 1978

top 62.8%

This planet

2.47R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

K2-180 b 2.47 R⊕ TOI-1244 b 2.47 R⊕ HIP 116454 b 2.47 R⊕

Metric	Earth	K2-163 b	Jupiter
Radius (R⊕)	1.00	2.47	11.21
Mass (M⊕)	1.00	6.65	317.83
Density (g/cm³)	5.51	2.44	1.33
Surface Gravity (g)	1.00	1.09	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 56760743

Gaia DR2

Gaia DR2 3697972721667206144

Gaia DR3

Gaia DR3 3697972721667206144

System

K2-163

Percentile among Sub-Neptune cohort

Radius 2.466 R⊕ · percentile 37 / cohort 1978

Mass 6.650 M⊕ · percentile 35 / cohort 1978

Orbital period 6.67 d · percentile 21 / cohort 1946

Distance 208.53 pc · percentile 30 / cohort 1975

ESI 0.709 · percentile 93 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

6.673 days

Semi-major axis

— AU

Eccentricity

—

Inclination

88.25 °

Year Length

A year here lasts approximately 6.67 Earth days (1.8% of a terrestrial year).

Transit Fingerprint

Rp / R★

0.029663

Transit midpoint (BJD)

2,457,582.8484

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.709

0 = alien, 1 = Earth-identical

Insufficient insolation data. Close-orbiting tidally-locked around a cool host.

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 K2-210 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

Host System: K2-163

Spectral Class

K-type orange

Effective Temperature

4,937 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.762 R☉

Stellar Mass

0.826 M☉

Metallicity [Fe/H]

0.14

Extended Stellar Properties

Surface gravity (log g)

4.710 dex

Stellar density

2.303 g/cm³

Systemic radial velocity

22.27 km/s

Metallicity ratio

[Fe/H]

Distance

208.53 parsec

Light-years 680.13 ly

V-band magnitude

13.08 mag

Voyager-speed travel 11,994,089 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

4.769 mas

Total Proper Motion

69.714 mas/yr

PM Right Ascension

-18.32 mas/yr

PM Declination

-67.26 mas/yr

Galactic Cartesian (pc)

x = -0.999 · y = -0.041 · z = -0.009

Equatorial (J2000)

RA 182.32925° · Dec -0.53934°

Galactic ℓ, b

281.122° · 60.536°

Ecliptic λ, β

182.348° · 0.431°

HTM-20 index

-774008592

Similar Worlds

K2-180 b

Sub-Neptune · K-type orange

Radius 2.47 R⊕ · 665.0 ly

TOI-1244 b

Sub-Neptune · K-type orange

Radius 2.47 R⊕ · 334.5 ly

HIP 116454 b

Sub-Neptune · K-type orange

Radius 2.47 R⊕ · 203.7 ly

Kepler-306 d

Sub-Neptune · K-type orange

Radius 2.47 R⊕ · 2,529.9 ly

TOI-5800 b

Sub-Neptune · K-type orange

Radius 2.46 R⊕ · 139.9 ly

Kepler-1388 e

Sub-Neptune · K-type orange

Radius 2.46 R⊕ · 1,480.1 ly

Explore Related Categories

Sub-Neptune Planets Transit Discoveries K2 Mission K-type orange Hosts