Key parameters at a glance
- A radius of 12.04 Earth radii
- A mass of 346.43 Earth masses
- Surface gravity around 2.39 g
- An orbital period of 67.128 days
- Semi-major axis 0.3630 AU
- Equilibrium temperature 659 K (386 °C)
- Distance from Earth 3,780.83 light-years
- Earth Similarity Index 0.232
- Travel time at Voyager 1 speed 66,674,986 years
1 sibling around KOI-134
KOI-134 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 |
|---|---|---|---|---|---|---|
| KOI-134 c | Neptune-like | 9.86 | 69.92 | 33.950 | — | 2025 |
| KOI-134 b this | Gas Giant | 12.04 | 346.43 | 67.128 | 659 | 2025 |
KOI-134 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1491of 1771
top 84.1%
This planet
12.04R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | KOI-134 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.04 | 11.21 |
| Mass (M⊕) | 1.00 | 346.43 | 317.83 |
| Density (g/cm³) | 5.51 | 1.09 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.39 | 2.53 |
| Insolation (S⊕) | 1.00 | 45.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 346.433 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 271772050
Gaia DR2
Gaia DR2 2079971473693847168
Gaia DR3
Gaia DR3 2079971473693847168
System
KOI-134
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 67.13 Earth days (18.4% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.3630 AU.
Transit Fingerprint
Depth
0.528 %
Duration
11.300 h
Impact parameter b
0.386
Rp / R★
0.066180
Transit midpoint (BJD)
2,454,984.7277
Photometric dip
Transit produces a flux drop of 5,276 ppm lasting ≈ 11.30 h.
Extended Orbital Architecture
Planet / star radius ratio
0.066180
Semi-major axis / stellar radius
46.200
Impact parameter (b)
0.386
Transit mid-time (BJD)
2,454,984.7277
Long. of periastron (ω)
153.20°
Angular separation (arcsec)
0.31300
Eq. Temperature
659K
(386 °C)
Insolation (S⊕)
45.00
Earth = 1.00
Earth Similarity (ESI)
0.232
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Transit timing variations
Gravitational interactions from neighbours have been detected.
Discovery Paper
Primary reference
Nabbie et al. 2025Instrument
Kepler CCD Array
Publication
2025-06
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Kepler (4 shown).
Host System: KOI-134
Spectral Class
F-type yellow-white
Effective Temperature
6,160 K — hotter than the Sun (5,778 K)
Estimated Age
2.40 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.667 R☉
Stellar Mass
1.407 M☉
Metallicity [Fe/H]
0.43
Extended Stellar Properties
Surface gravity (log g)
4.110 dex
Stellar density
1.320 g/cm³
Rotational v·sin i
10.59 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.834 mas
Total Proper Motion
6.656 mas/yr
PM Right Ascension
-2.32 mas/yr
PM Declination
-6.24 mas/yr
Galactic Cartesian (pc)
x = 0.303 · y = -0.634 · z = 0.712
Equatorial (J2000)
RA 295.58660° · Dec 45.36494°
Galactic ℓ, b
78.698° · 10.761°
Ecliptic λ, β
315.481° · 64.816°
HTM-20 index
-2018478015
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