Key parameters at a glance
- A radius of 1.29 Earth radii
- A mass of 18.30 Earth masses
- Surface gravity around 11.00 g
- An orbital period of 6.040 days
- Semi-major axis 0.0620 AU
- Equilibrium temperature 841 K (568 °C)
- Distance from Earth 1,008.97 light-years
- Earth Similarity Index 0.217
- Travel time at Voyager 1 speed 17,793,244 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around Kepler-211
Kepler-211 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-211 b | Super-Earth | 1.26 | 2.13 | 4.139 | 954 | 2014 |
| Kepler-211 c this | Super-Earth | 1.29 | 18.30 | 6.040 | 841 | 2014 |
Kepler-211 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#1100of 1176
top 93.5%
This planet
1.29R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-211 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.29 | 11.21 |
| Mass (M⊕) | 1.00 | 18.30 | 317.83 |
| Density (g/cm³) | 5.51 | 46.80 | 1.33 |
| Surface Gravity (g) | 1.00 | 11.00 | 2.53 |
| Insolation (S⊕) | 1.00 | 95.44 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 18.300 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 352007758
Gaia DR2
Gaia DR2 2105743987587112064
Gaia DR3
Gaia DR3 2105743987587112064
System
Kepler-211
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 6.04 Earth days (1.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0620 AU.
Transit Fingerprint
Depth
0.027 %
Duration
2.053 h
Impact parameter b
0.040
Rp / R★
0.014845
Transit midpoint (BJD)
2,455,005.5944
Photometric dip
Transit produces a flux drop of 273 ppm lasting ≈ 2.05 h.
Extended Orbital Architecture
Planet / star radius ratio
0.014845
Semi-major axis / stellar radius
7.100
Impact parameter (b)
0.040
Transit mid-time (BJD)
2,455,005.5944
Angular separation (arcsec)
0.20000
Eq. Temperature
841K
(568 °C)
Insolation (S⊕)
95.44
Earth = 1.00
Earth Similarity (ESI)
0.217
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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-211
Spectral Class
K-type orange
Effective Temperature
5,123 K — cooler than the Sun (5,778 K)
Estimated Age
1.55 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.816 R☉
Stellar Mass
0.867 M☉
Metallicity [Fe/H]
0.15
Extended Stellar Properties
Surface gravity (log g)
4.547 dex
Stellar density
1.820 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
3.204 mas
Total Proper Motion
7.119 mas/yr
PM Right Ascension
-4.01 mas/yr
PM Declination
5.88 mas/yr
Galactic Cartesian (pc)
x = 0.194 · y = -0.703 · z = 0.684
Equatorial (J2000)
RA 285.43912° · Dec 43.16851°
Galactic ℓ, b
73.503° · 16.424°
Ecliptic λ, β
297.503° · 65.140°
HTM-20 index
159556624
Similar Worlds
Kepler-1945 b
Super-Earth · K-type orange
Radius 1.29 R⊕ · —
Kepler-1953 b
Super-Earth · K-type orange
Radius 1.29 R⊕ · 1,975.3 ly
Kepler-1037 b
Super-Earth · K-type orange
Radius 1.28 R⊕ · 1,457.6 ly
Kepler-787 b
Super-Earth · K-type orange
Radius 1.28 R⊕ · 1,642.4 ly
Kepler-1379 b
Super-Earth · K-type orange
Radius 1.30 R⊕ · 3,168.0 ly
Kepler-1254 c
Super-Earth · K-type orange
Radius 1.30 R⊕ · 2,031.4 ly