Key parameters at a glance

A radius of 2.34 Earth radii
A mass of 6.08 Earth masses
Surface gravity around 1.11 g
An orbital period of 4.823 days
Semi-major axis 0.0570 AU
Equilibrium temperature 1,060 K (787 °C)
Distance from Earth 2,070.89 light-years
Earth Similarity Index 0.241
Travel time at Voyager 1 speed 36,520,172 years

1 sibling around Kepler-213

Kepler-213 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
Kepler-213 b	Super-Earth	1.62	3.26	2.462	1,326	2014
Kepler-213 c this	Sub-Neptune	2.34	6.08	4.823	1,060	2014

Kepler-213 c Planet Profile

Physical Specs

Radius

2.34 R⊕

Radius (Jupiter)

0.209 R♃

Mass

6.08 M⊕

Mass (Jupiter)

0.019 M♃

Density

2.61 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.241

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1429of 1978

top 72.2%

This planet

2.34R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-246 b 2.34 R⊕ Kepler-275 b 2.34 R⊕ Kepler-338 c 2.34 R⊕

Metric	Earth	Kepler-213 c	Jupiter
Radius (R⊕)	1.00	2.34	11.21
Mass (M⊕)	1.00	6.08	317.83
Density (g/cm³)	5.51	2.61	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	339.54	0.037

Star Catalogue Identifiers

TIC

TIC 159521326

Gaia DR2

Gaia DR2 2127001056345369984

Gaia DR3

Gaia DR3 2127001056345369984

System

Kepler-213

Percentile among Sub-Neptune cohort

Radius 2.340 R⊕ · percentile 27 / cohort 1978

Mass 6.080 M⊕ · percentile 26 / cohort 1978

Orbital period 4.82 d · percentile 11 / cohort 1946

Distance 634.94 pc · percentile 55 / cohort 1975

ESI 0.241 · percentile 14 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

4.823 days

Semi-major axis

0.0570 AU

Eccentricity

0.000

Inclination

87.56 °

Year Length

A year here lasts approximately 4.82 Earth days (1.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0570 AU.

Transit Fingerprint

Depth

0.033 %

Duration

0.828 h

Impact parameter b

0.750

Rp / R★

0.017112

Transit midpoint (BJD)

2,454,967.4365

Photometric dip

Transit produces a flux drop of 332 ppm lasting ≈ 0.83 h.

Extended Orbital Architecture

Planet / star radius ratio

0.017112

Semi-major axis / stellar radius

16.200

Impact parameter (b)

0.750

Transit mid-time (BJD)

2,454,967.4365

Angular separation (arcsec)

0.08980

Eq. Temperature

1,060K

(787 °C)

Insolation (S⊕)

339.54

Earth = 1.00

Earth Similarity (ESI)

0.241

0 = alien, 1 = Earth-identical

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

Discovery Paper

Primary reference

Rowe et al. 2014

Instrument

Kepler CCD Array

Publication

2014-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2014 at Kepler (12 shown).

Kepler-186 e · Super-Earth Kepler-395 c · Super-Earth Kepler-220 e · Super-Earth Kepler-249 d · Super-Earth Kepler-296 f · Super-Earth Kepler-367 c · Rocky Terrestrial Kepler-296 e · Super-Earth Kepler-155 c · Sub-Neptune Kepler-138 d · Super-Earth Kepler-333 c · Rocky Terrestrial Kepler-331 d · Super-Earth Kepler-267 d · Sub-Neptune

Host System: Kepler-213

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,696 K — cooler than the Sun (5,778 K)

Estimated Age

1.62 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.195 R☉

Stellar Mass

1.070 M☉

Metallicity [Fe/H]

0.15

Extended Stellar Properties

Surface gravity (log g)

4.310 dex

Stellar density

0.780 g/cm³

Metallicity ratio

[Fe/H]

Distance

634.94 parsec

Light-years 2,070.89 ly

V-band magnitude

13.71 mag

Voyager-speed travel 36,520,172 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.546 mas

Total Proper Motion

23.094 mas/yr

PM Right Ascension

0.59 mas/yr

PM Declination

23.09 mas/yr

Galactic Cartesian (pc)

x = 0.253 · y = -0.665 · z = 0.703

Equatorial (J2000)

RA 290.82419° · Dec 44.64728°

Galactic ℓ, b

76.507° · 13.456°

Ecliptic λ, β

307.416° · 65.404°

HTM-20 index

639324357