Key parameters at a glance

A radius of 2.35 Earth radii
A mass of 6.12 Earth masses
Surface gravity around 1.11 g
An orbital period of 7.694 days
Semi-major axis 0.0790 AU
Equilibrium temperature 1,069 K (796 °C)
Distance from Earth 3,873.00 light-years
Earth Similarity Index 0.238
Travel time at Voyager 1 speed 68,300,433 years

1 sibling around Kepler-216

Kepler-216 b 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-216 b this	Sub-Neptune	2.35	6.12	7.694	1,069	2014
Kepler-216 c	Sub-Neptune	3.04	9.48	17.407	814	2014

Kepler-216 b Planet Profile

Physical Specs

Radius

2.35 R⊕

Radius (Jupiter)

0.210 R♃

Mass

6.12 M⊕

Mass (Jupiter)

0.019 M♃

Density

2.59 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.238

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

#1416of 1978

top 71.5%

This planet

2.35R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

HD 158259 f 2.35 R⊕ Kepler-306 c 2.35 R⊕ Kepler-172 b 2.35 R⊕

Metric	Earth	Kepler-216 b	Jupiter
Radius (R⊕)	1.00	2.35	11.21
Mass (M⊕)	1.00	6.12	317.83
Density (g/cm³)	5.51	2.59	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	540.03	0.037

Star Catalogue Identifiers

TIC

TIC 270698499

Gaia DR2

Gaia DR2 2128067720065692672

Gaia DR3

Gaia DR3 2128067720065692672

System

Kepler-216

Percentile among Sub-Neptune cohort

Radius 2.350 R⊕ · percentile 28 / cohort 1978

Mass 6.120 M⊕ · percentile 27 / cohort 1978

Orbital period 7.69 d · percentile 25 / cohort 1946

Distance 1,187.47 pc · percentile 86 / cohort 1975

ESI 0.238 · percentile 14 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

7.694 days

Semi-major axis

0.0790 AU

Eccentricity

0.000

Inclination

88.11 °

Year Length

A year here lasts approximately 7.69 Earth days (2.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0790 AU.

Transit Fingerprint

Depth

0.030 %

Duration

5.050 h

Impact parameter b

0.720

Rp / R★

0.017150

Transit midpoint (BJD)

2,455,009.5011

Photometric dip

Transit produces a flux drop of 304 ppm lasting ≈ 5.05 h.

Extended Orbital Architecture

Planet / star radius ratio

0.017150

Semi-major axis / stellar radius

8.210

Impact parameter (b)

0.720

Transit mid-time (BJD)

2,455,009.5011

Angular separation (arcsec)

0.06650

Eq. Temperature

1,069K

(796 °C)

Insolation (S⊕)

540.03

Earth = 1.00

Earth Similarity (ESI)

0.238

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-216

Spectral Class

F-type yellow-white

Effective Temperature

6,091 K — hotter than the Sun (5,778 K)

Estimated Age

0.28 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.260 R☉

Stellar Mass

1.126 M☉

Metallicity [Fe/H]

-0.15

Extended Stellar Properties

Surface gravity (log g)

4.280 dex

Stellar density

0.310 g/cm³

Metallicity ratio

[M/H]

Distance

1,187.47 parsec

Light-years 3,873.00 ly

V-band magnitude

14.05 mag

Voyager-speed travel 68,300,433 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.813 mas

Total Proper Motion

7.741 mas/yr

PM Right Ascension

-4.92 mas/yr

PM Declination

-5.98 mas/yr

Galactic Cartesian (pc)

x = 0.279 · y = -0.634 · z = 0.721

Equatorial (J2000)

RA 293.72807° · Dec 46.12911°

Galactic ℓ, b

78.785° · 12.264°

Ecliptic λ, β

313.354° · 66.034°

HTM-20 index

-1393058667