Key parameters at a glance
- A radius of 1.45 Earth radii
- A mass of 2.70 Earth masses
- Surface gravity around 1.28 g
- An orbital period of 199.669 days
- Semi-major axis 0.6193 AU
- Equilibrium temperature 305 K (32 °C)
- Distance from Earth 2,073.49 light-years
- Earth Similarity Index 0.891
- Travel time at Voyager 1 speed 36,566,014 years
1 sibling around Kepler-1126
Kepler-1126 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-1126 b | Super-Earth | 1.73 | 3.64 | 108.593 | 374 | 2016 |
| Kepler-1126 c this | Super-Earth | 1.45 | 2.70 | 199.669 | 305 | 2023 |
Kepler-1126 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#837of 1176
top 71.1%
This planet
1.45R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-1126 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.45 | 11.21 |
| Mass (M⊕) | 1.00 | 2.70 | 317.83 |
| Density (g/cm³) | 5.51 | 4.87 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.28 | 2.53 |
| Insolation (S⊕) | 1.00 | 2.06 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 352013661
Gaia DR2
Gaia DR2 2106496607595412480
Gaia DR3
Gaia DR3 2106496607595412480
System
Kepler-1126
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 199.67 Earth days (54.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.6193 AU.
Transit Fingerprint
Depth
0.025 %
Duration
8.996 h
Impact parameter b
0.046
Rp / R★
0.014438
Transit midpoint (BJD)
2,454,964.6090
Photometric dip
Transit produces a flux drop of 252 ppm lasting ≈ 9.00 h.
Extended Orbital Architecture
Planet / star radius ratio
0.014438
Semi-major axis / stellar radius
171.800
Impact parameter (b)
0.046
Transit mid-time (BJD)
2,454,964.6090
Angular separation (arcsec)
0.97400
Eq. Temperature
305K
(32 °C)
Insolation (S⊕)
2.06
Earth = 1.00
Earth Similarity (ESI)
0.891
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure.
Discovery Paper
Primary reference
Valizadegan et al. 2023Instrument
Kepler CCD Array
Publication
2023-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Kepler (12 shown).
Host System: Kepler-1126
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,678 K — cooler than the Sun (5,778 K)
Estimated Age
12.30 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.921 R☉
Stellar Mass
0.794 M☉
Metallicity [Fe/H]
-0.40
Extended Stellar Properties
Surface gravity (log g)
4.409 dex
Stellar density
2.408 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.544 mas
Total Proper Motion
8.485 mas/yr
PM Right Ascension
-7.70 mas/yr
PM Declination
3.56 mas/yr
Galactic Cartesian (pc)
x = 0.189 · y = -0.673 · z = 0.716
Equatorial (J2000)
RA 285.69196° · Dec 45.68940°
Galactic ℓ, b
76.018° · 17.191°
Ecliptic λ, β
299.611° · 67.522°
HTM-20 index
-1235604406
Similar Worlds
TOI-1011 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.45 R⊕ · 171.6 ly
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HD 20794 b
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Kepler-280 b
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Kepler-936 b
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Kepler-1226 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.45 R⊕ · 3,671.6 ly