Key parameters at a glance
- A radius of 1.68 Earth radii
- A mass of 3.46 Earth masses
- Surface gravity around 1.23 g
- An orbital period of 4.866 days
- Semi-major axis 0.0506 AU
- Equilibrium temperature 881 K (608 °C)
- Distance from Earth 2,770.08 light-years
- Earth Similarity Index 0.330
- Travel time at Voyager 1 speed 48,850,394 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around Kepler-1266
Kepler-1266 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-1266 c this | Super-Earth | 1.68 | 3.46 | 4.866 | 881 | 2021 |
| Kepler-1266 b | Sub-Neptune | 2.58 | 7.18 | 28.475 | 489 | 2016 |
Kepler-1266 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#434of 1176
top 36.8%
This planet
1.68R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-1266 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.68 | 11.21 |
| Mass (M⊕) | 1.00 | 3.46 | 317.83 |
| Density (g/cm³) | 5.51 | 4.01 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.23 | 2.53 |
| Insolation (S⊕) | 1.00 | 110.40 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 158167159
Gaia DR2
Gaia DR2 2105528350169042560
Gaia DR3
Gaia DR3 2105528350169042560
System
Kepler-1266
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.87 Earth days (1.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0506 AU.
Transit Fingerprint
Depth
0.037 %
Duration
1.758 h
Impact parameter b
0.237
Rp / R★
0.018741
Transit midpoint (BJD)
2,455,186.3385
Photometric dip
Transit produces a flux drop of 367 ppm lasting ≈ 1.76 h.
Extended Orbital Architecture
Planet / star radius ratio
0.018741
Semi-major axis / stellar radius
11.600
Impact parameter (b)
0.237
Transit mid-time (BJD)
2,455,186.3385
Angular separation (arcsec)
0.05960
Eq. Temperature
881K
(608 °C)
Insolation (S⊕)
110.40
Earth = 1.00
Earth Similarity (ESI)
0.330
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
Valizadegan et al. 2022Instrument
Kepler CCD Array
Publication
2022-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Kepler (12 shown).
Host System: Kepler-1266
Spectral Class
K-type orange
Effective Temperature
4,996 K — cooler than the Sun (5,778 K)
Estimated Age
7.24 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.831 R☉
Stellar Mass
0.791 M☉
Metallicity [Fe/H]
0.14
Extended Stellar Properties
Surface gravity (log g)
4.497 dex
Stellar density
0.738 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
1.149 mas
Total Proper Motion
19.670 mas/yr
PM Right Ascension
5.14 mas/yr
PM Declination
-18.99 mas/yr
Galactic Cartesian (pc)
x = 0.201 · y = -0.707 · z = 0.679
Equatorial (J2000)
RA 285.86933° · Dec 42.72800°
Galactic ℓ, b
73.202° · 15.966°
Ecliptic λ, β
297.958° · 64.634°
HTM-20 index
1284420662
Similar Worlds
Kepler-844 b
Super-Earth · K-type orange
Radius 1.68 R⊕ · 1,408.3 ly
Kepler-778 b
Super-Earth · K-type orange
Radius 1.68 R⊕ · 3,059.9 ly
TOI-2411 b
Super-Earth · K-type orange
Radius 1.68 R⊕ · 194.2 ly
Kepler-167 c
Super-Earth · K-type orange
Radius 1.67 R⊕ · 1,115.2 ly
K2-381 d
Super-Earth · K-type orange
Radius 1.69 R⊕ · 475.2 ly
Kepler-1802 b
Super-Earth · K-type orange
Radius 1.67 R⊕ · 2,076.6 ly