Key parameters at a glance
- A radius of 12.67 Earth radii
- A mass of 908.96 Earth masses
- Surface gravity around 5.66 g
- An orbital period of 12.875 days
- Semi-major axis 0.1143 AU
- Equilibrium temperature 1,000 K (727 °C)
- Distance from Earth 3,987.39 light-years
- Earth Similarity Index 0.165
- Travel time at Voyager 1 speed 70,317,576 years
Kepler-434 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1168of 1771
top 65.9%
This planet
12.67R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | Kepler-434 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.67 | 11.21 |
| Mass (M⊕) | 1.00 | 908.96 | 317.83 |
| Density (g/cm³) | 5.51 | 2.40 | 1.33 |
| Surface Gravity (g) | 1.00 | 5.66 | 2.53 |
| Insolation (S⊕) | 1.00 | 158.29 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 908.960 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 270611401
Gaia DR2
Gaia DR2 2077823440291891840
Gaia DR3
Gaia DR3 2077823440291891840
System
Kepler-434
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 12.87 Earth days (3.5% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.1143 AU.
Transit Fingerprint
Depth
0.386 %
Duration
2.288 h
Impact parameter b
0.979
Rp / R★
0.083500
Transit midpoint (BJD)
2,455,003.0228
Photometric dip
Transit produces a flux drop of 3,861 ppm lasting ≈ 2.29 h.
Extended Orbital Architecture
Planet / star radius ratio
0.083500
Semi-major axis / stellar radius
17.900
Impact parameter (b)
0.979
RV semi-amplitude (K)
221.000 m/s
Transit mid-time (BJD)
2,455,003.0228
Long. of periastron (ω)
82.00°
Angular separation (arcsec)
0.09350
Eq. Temperature
1,000K
(727 °C)
Insolation (S⊕)
158.29
Earth = 1.00
Earth Similarity (ESI)
0.165
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Radial velocity
Stellar wobble has been measured spectroscopically.
Discovery Paper
Primary reference
Almenara et al. 2015Instrument
Kepler CCD Array
Publication
2015-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2015 at Kepler (12 shown).
Host System: Kepler-434
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,977 K — hotter than the Sun (5,778 K)
Estimated Age
4.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.380 R☉
Stellar Mass
1.198 M☉
Metallicity [Fe/H]
0.25
Extended Stellar Properties
Surface gravity (log g)
4.242 dex
Stellar density
0.650 g/cm³
Systemic radial velocity
-51.16 km/s
Rotational v·sin i
3.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
0.790 mas
Total Proper Motion
8.692 mas/yr
PM Right Ascension
-0.77 mas/yr
PM Declination
-8.66 mas/yr
Galactic Cartesian (pc)
x = 0.293 · y = -0.671 · z = 0.681
Equatorial (J2000)
RA 293.58639° · Dec 42.92886°
Galactic ℓ, b
75.823° · 10.911°
Ecliptic λ, β
310.356° · 63.101°
HTM-20 index
-95163825
Similar Worlds
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Gas Giant · G-type yellow (Sun-like)
Radius 12.67 R⊕ · 293.4 ly
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Gas Giant · G-type yellow (Sun-like)
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OGLE-TR-182 b
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Radius 12.67 R⊕ · 8,159.6 ly
Kepler-762 b
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WASP-164 b
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HR 810 b
Gas Giant · G-type yellow (Sun-like)
Radius 12.70 R⊕ · 56.5 ly