Key parameters at a glance
- A radius of 3.04 Earth radii
- A mass of 9.48 Earth masses
- Surface gravity around 1.03 g
- An orbital period of 17.407 days
- Semi-major axis 0.1360 AU
- Equilibrium temperature 814 K (541 °C)
- Distance from Earth 3,873.00 light-years
- Earth Similarity Index 0.288
- Travel time at Voyager 1 speed 68,300,433 years
1 sibling around Kepler-216
Kepler-216 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-216 b | Sub-Neptune | 2.35 | 6.12 | 7.694 | 1,069 | 2014 |
| Kepler-216 c this | Sub-Neptune | 3.04 | 9.48 | 17.407 | 814 | 2014 |
Kepler-216 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#481of 1978
top 24.3%
This planet
3.04R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-216 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.04 | 11.21 |
| Mass (M⊕) | 1.00 | 9.48 | 317.83 |
| Density (g/cm³) | 5.51 | 1.85 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.03 | 2.53 |
| Insolation (S⊕) | 1.00 | 182.06 | 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
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 17.41 Earth days (4.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1360 AU.
Transit Fingerprint
Depth
0.058 %
Duration
6.869 h
Impact parameter b
0.090
Rp / R★
0.023920
Transit midpoint (BJD)
2,455,004.0061
Photometric dip
Transit produces a flux drop of 582 ppm lasting ≈ 6.87 h.
Extended Orbital Architecture
Planet / star radius ratio
0.023920
Semi-major axis / stellar radius
19.807
Impact parameter (b)
0.090
Transit mid-time (BJD)
2,455,004.0061
Angular separation (arcsec)
0.11500
Eq. Temperature
814K
(541 °C)
Insolation (S⊕)
182.06
Earth = 1.00
Earth Similarity (ESI)
0.288
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Discovery Paper
Primary reference
Rowe et al. 2014Instrument
Kepler CCD Array
Publication
2014-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
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]
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
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Kepler-791 b
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Kepler-1937 b
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