Key parameters at a glance

A radius of 2.30 Earth radii
A mass of 5.90 Earth masses
Surface gravity around 1.12 g
An orbital period of 10.788 days
Semi-major axis 0.0932 AU
Equilibrium temperature 787 K (514 °C)
Distance from Earth 1,073.19 light-years
Earth Similarity Index 0.332
Travel time at Voyager 1 speed 18,925,651 years

2 siblings around K2-183

K2-183 c shares its host star with 2 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
K2-183 b	Rocky Terrestrial	1.10	1.37	0.469	—	2018
K2-183 c this	Sub-Neptune	2.30	5.90	10.788	787	2018
K2-183 d	Sub-Neptune	2.30	5.90	22.620	615	2018

K2-183 c Planet Profile

Physical Specs

Radius

2.30 R⊕

Radius (Jupiter)

0.205 R♃

Mass

5.90 M⊕

Mass (Jupiter)

0.019 M♃

Density

2.66 g/cm³

Surface Gravity

1.12 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.332

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

#1499of 1978

top 75.7%

This planet

2.30R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-328 b 2.30 R⊕ Kepler-156 b 2.30 R⊕ GJ 536 c 2.30 R⊕

Metric	Earth	K2-183 c	Jupiter
Radius (R⊕)	1.00	2.30	11.21
Mass (M⊕)	1.00	5.90	317.83
Density (g/cm³)	5.51	2.66	1.33
Surface Gravity (g)	1.00	1.12	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 60256211

Gaia DR2

Gaia DR2 652007410271734912

Gaia DR3

Gaia DR3 652007410271734912

System

K2-183

Percentile among Sub-Neptune cohort

Radius 2.300 R⊕ · percentile 24 / cohort 1978

Mass 5.900 M⊕ · percentile 23 / cohort 1978

Orbital period 10.79 d · percentile 37 / cohort 1946

Distance 329.04 pc · percentile 37 / cohort 1975

ESI 0.332 · percentile 36 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

10.788 days

Semi-major axis

0.0932 AU

Eccentricity

—

Inclination

90.50 °

Year Length

A year here lasts approximately 10.79 Earth days (3.0% of a terrestrial year) at a mean orbital distance of 0.0932 AU.

Transit Fingerprint

Depth

0.090 %

Duration

3.850 h

Impact parameter b

0.470

Rp / R★

0.024200

Transit midpoint (BJD)

2,457,212.4732

Photometric dip

Transit produces a flux drop of 901 ppm lasting ≈ 3.85 h.

Extended Orbital Architecture

Planet / star radius ratio

0.024200

Semi-major axis / stellar radius

22.000

Impact parameter (b)

0.470

Transit mid-time (BJD)

2,457,212.4732

Angular separation (arcsec)

0.28300

Eq. Temperature

787K

(514 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.332

0 = alien, 1 = Earth-identical

Insufficient insolation data — the surface is too hot to retain surface water.

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: K2-183

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,482 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.870 R☉

Stellar Mass

0.942 M☉

Metallicity [Fe/H]

0.09

Extended Stellar Properties

Surface gravity (log g)

4.600 dex

Stellar density

1.474 g/cm³

Systemic radial velocity

92.34 km/s

Metallicity ratio

[Fe/H]

Distance

329.04 parsec

Light-years 1,073.19 ly

V-band magnitude

12.87 mag

Voyager-speed travel 18,925,651 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

3.011 mas

Total Proper Motion

4.010 mas/yr

PM Right Ascension

3.79 mas/yr

PM Declination

-1.30 mas/yr

Galactic Cartesian (pc)

x = -0.557 · y = 0.795 · z = 0.242

Equatorial (J2000)

RA 125.00718° · Dec 14.01946°

Galactic ℓ, b

209.822° · 25.848°

Ecliptic λ, β

123.987° · -5.385°

HTM-20 index

616869696