Key parameters at a glance
- A radius of 1.09 Earth radii
- A mass of 1.32 Earth masses
- Surface gravity around 1.11 g
- An orbital period of 16.258 days
- Semi-major axis 0.1330 AU
- Equilibrium temperature 830 K (557 °C)
- Distance from Earth 2,241.32 light-years
- Earth Similarity Index 0.390
- Travel time at Voyager 1 speed 39,525,755 years
1 sibling around Kepler-212
Kepler-212 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-212 b this | Rocky Terrestrial | 1.09 | 1.32 | 16.258 | 830 | 2014 |
| Kepler-212 c | Sub-Neptune | 2.74 | 7.95 | 31.805 | 664 | 2014 |
Kepler-212 b Planet Profile
Physical Specs
Classification
Planet Type
Rocky Terrestrial
Discovery
Size rank in cohort
Rank by radius
#240of 570
top 41.9%
This planet
1.09R⊕
Rocky Terrestrial median
1.01R⊕
Nearest-size peers
| Metric | Earth | Kepler-212 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.09 | 11.21 |
| Mass (M⊕) | 1.00 | 1.32 | 317.83 |
| Density (g/cm³) | 5.51 | 5.60 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.11 | 2.53 |
| Insolation (S⊕) | 1.00 | 133.87 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 158551888
Gaia DR2
Gaia DR2 2102610280669509888
Gaia DR3
Gaia DR3 2102610280669509888
System
Kepler-212
Percentile among Rocky Terrestrial cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 16.26 Earth days (4.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1330 AU.
Transit Fingerprint
Depth
0.006 %
Duration
6.596 h
Impact parameter b
0.190
Rp / R★
0.007021
Transit midpoint (BJD)
2,454,972.6477
Photometric dip
Transit produces a flux drop of 60 ppm lasting ≈ 6.60 h.
Extended Orbital Architecture
Planet / star radius ratio
0.007021
Semi-major axis / stellar radius
19.450
Impact parameter (b)
0.190
Transit mid-time (BJD)
2,454,972.6477
Angular separation (arcsec)
0.19400
Eq. Temperature
830K
(557 °C)
Insolation (S⊕)
133.87
Earth = 1.00
Earth Similarity (ESI)
0.390
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-212
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,852 K — hotter than the Sun (5,778 K)
Estimated Age
5.13 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.455 R☉
Stellar Mass
1.166 M☉
Metallicity [Fe/H]
0.22
Extended Stellar Properties
Surface gravity (log g)
4.182 dex
Stellar density
0.390 g/cm³
Systemic radial velocity
-7.08 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 15 bands
Astrometric Data
Parallax
1.426 mas
Total Proper Motion
8.763 mas/yr
PM Right Ascension
-2.27 mas/yr
PM Declination
-8.46 mas/yr
Galactic Cartesian (pc)
x = 0.221 · y = -0.695 · z = 0.684
Equatorial (J2000)
RA 287.62082° · Dec 43.14162°
Galactic ℓ, b
74.115° · 14.946°
Ecliptic λ, β
301.104° · 64.689°
HTM-20 index
-2107769569
Similar Worlds
Kepler-115 b
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.09 R⊕ · 2,033.9 ly
Kepler-889 b
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.09 R⊕ · 1,951.4 ly
Kepler-1561 b
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.09 R⊕ · 2,736.7 ly
K2-190 c
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.09 R⊕ · 524.1 ly
Kepler-374 c
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.10 R⊕ · 4,127.9 ly
K2-183 b
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.10 R⊕ · 1,073.2 ly