Key parameters at a glance
- A radius of 2.48 Earth radii
- A mass of 6.71 Earth masses
- Surface gravity around 1.09 g
- An orbital period of 6.618 days
- Semi-major axis 0.0710 AU
- Equilibrium temperature 1,066 K (793 °C)
- Distance from Earth 4,470.91 light-years
- Earth Similarity Index 0.234
- Travel time at Voyager 1 speed 78,844,561 years
1 sibling around Kepler-266
Kepler-266 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-266 b this | Sub-Neptune | 2.48 | 6.71 | 6.618 | 1,066 | 2014 |
| Kepler-266 c | Sub-Neptune | 3.89 | 14.40 | 107.724 | 421 | 2014 |
Kepler-266 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1212of 1978
top 61.2%
This planet
2.48R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-266 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.48 | 11.21 |
| Mass (M⊕) | 1.00 | 6.71 | 317.83 |
| Density (g/cm³) | 5.51 | 2.42 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.09 | 2.53 |
| Insolation (S⊕) | 1.00 | 230.40 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 271046092
Gaia DR2
Gaia DR2 2078328287926130304
Gaia DR3
Gaia DR3 2078328287926130304
System
Kepler-266
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 6.62 Earth days (1.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0710 AU.
Transit Fingerprint
Depth
0.055 %
Duration
3.717 h
Impact parameter b
0.360
Rp / R★
0.022570
Transit midpoint (BJD)
2,455,193.3696
Photometric dip
Transit produces a flux drop of 549 ppm lasting ≈ 3.72 h.
Extended Orbital Architecture
Planet / star radius ratio
0.022570
Semi-major axis / stellar radius
14.024
Impact parameter (b)
0.360
Transit mid-time (BJD)
2,455,193.3696
Angular separation (arcsec)
0.05180
Eq. Temperature
1,066K
(793 °C)
Insolation (S⊕)
230.40
Earth = 1.00
Earth Similarity (ESI)
0.234
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. 2014Instrument
Kepler CCD Array
Publication
2014-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
Host System: Kepler-266
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,885 K — hotter than the Sun (5,778 K)
Estimated Age
4.79 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.028 R☉
Stellar Mass
0.947 M☉
Metallicity [Fe/H]
0.16
Extended Stellar Properties
Surface gravity (log g)
4.453 dex
Stellar density
1.115 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.702 mas
Total Proper Motion
2.011 mas/yr
PM Right Ascension
-1.32 mas/yr
PM Declination
-1.52 mas/yr
Galactic Cartesian (pc)
x = 0.297 · y = -0.653 · z = 0.697
Equatorial (J2000)
RA 294.48438° · Dec 44.16694°
Galactic ℓ, b
77.247° · 10.898°
Ecliptic λ, β
312.730° · 64.018°
HTM-20 index
-1301123360
Similar Worlds
K2-15 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.48 R⊕ · 1,611.2 ly
Kepler-846 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.48 R⊕ · 3,676.2 ly
Kepler-256 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.48 R⊕ · 3,347.8 ly
Kepler-416 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.48 R⊕ · 2,253.1 ly
Kepler-713 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.48 R⊕ · 3,554.7 ly
Kepler-1829 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.48 R⊕ · 2,217.6 ly