Key parameters at a glance
- A radius of 13.75 Earth radii
- A mass of 539.68 Earth masses
- Surface gravity around 2.85 g
- An orbital period of 2.996 days
- Semi-major axis 0.0442 AU
- Equilibrium temperature 1,687 K (1414 °C)
- Distance from Earth 1,137.13 light-years
- Earth Similarity Index 0.077
- Travel time at Voyager 1 speed 20,053,284 years
K2-34 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#551of 1771
top 31.1%
This planet
13.75R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | K2-34 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.75 | 11.21 |
| Mass (M⊕) | 1.00 | 539.68 | 317.83 |
| Density (g/cm³) | 5.51 | 0.94 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.85 | 2.53 |
| Insolation (S⊕) | 1.00 | 963.57 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 539.675 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 178217113
Gaia DR2
Gaia DR2 665757593450097920
Gaia DR3
Gaia DR3 665757593450097920
System
K2-34
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.00 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0442 AU.
Transit Fingerprint
Depth
0.749 %
Duration
2.477 h
Impact parameter b
0.830
Rp / R★
0.088700
Transit midpoint (BJD)
2,457,141.3515
Photometric dip
Transit produces a flux drop of 7,493 ppm lasting ≈ 2.48 h.
Extended Orbital Architecture
Planet / star radius ratio
0.088700
Semi-major axis / stellar radius
6.680
Impact parameter (b)
0.830
RV semi-amplitude (K)
207.300 m/s
Transit mid-time (BJD)
2,457,141.3515
Sky-projected obliquity (λ)
-1.00°
Angular separation (arcsec)
0.12700
Eq. Temperature
1,687K
(1414 °C)
Insolation (S⊕)
963.57
Earth = 1.00
Earth Similarity (ESI)
0.077
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
Hirano et al. 2016Instrument
Kepler CCD Array
Publication
2016-07
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at K2 (12 shown).
Host System: K2-34
Spectral Class
F-type yellow-white
Effective Temperature
6,168 K — hotter than the Sun (5,778 K)
Estimated Age
2.88 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.420 R☉
Stellar Mass
1.160 M☉
Metallicity [Fe/H]
0.01
Extended Stellar Properties
Surface gravity (log g)
4.200 dex
Stellar density
0.675 g/cm³
Systemic radial velocity
46.31 km/s
Rotational v·sin i
6.31 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
2.840 mas
Total Proper Motion
14.234 mas/yr
PM Right Ascension
-14.20 mas/yr
PM Declination
1.05 mas/yr
Galactic Cartesian (pc)
x = -0.564 · y = 0.734 · z = 0.378
Equatorial (J2000)
RA 127.57872° · Dec 22.23592°
Galactic ℓ, b
202.139° · 31.134°
Ecliptic λ, β
124.424° · 3.175°
HTM-20 index
1670403872
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