Key parameters at a glance
- A radius of 13.34 Earth radii
- A mass of 232.02 Earth masses
- Surface gravity around 1.30 g
- An orbital period of 3.259 days
- Semi-major axis 0.0422 AU
- Equilibrium temperature 1,171 K (898 °C)
- Distance from Earth 582.11 light-years
- Earth Similarity Index 0.110
- Travel time at Voyager 1 speed 10,265,455 years
K2-29 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#789of 1771
top 44.5%
This planet
13.34R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | K2-29 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.34 | 11.21 |
| Mass (M⊕) | 1.00 | 232.02 | 317.83 |
| Density (g/cm³) | 5.51 | 0.53 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.30 | 2.53 |
| Insolation (S⊕) | 1.00 | 293.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 232.016 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 56399553
Gaia DR2
Gaia DR2 150054788545735424
Gaia DR3
Gaia DR3 150054788545735424
System
K2-29
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.26 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0422 AU.
Transit Fingerprint
Depth
1.901 %
Duration
2.220 h
Impact parameter b
0.580
Rp / R★
0.141880
Transit midpoint (BJD)
2,453,219.0095
Photometric dip
Transit produces a flux drop of 19,011 ppm lasting ≈ 2.22 h.
Extended Orbital Architecture
Planet / star radius ratio
0.141880
Semi-major axis / stellar radius
10.510
Impact parameter (b)
0.580
RV semi-amplitude (K)
103.500 m/s
Transit mid-time (BJD)
2,453,219.0095
Long. of periastron (ω)
132.00°
Sky-projected obliquity (λ)
1.50°
Angular separation (arcsec)
0.23600
Eq. Temperature
1,171K
(898 °C)
Insolation (S⊕)
293.00
Earth = 1.00
Earth Similarity (ESI)
0.110
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
Santerne et al. 2016Instrument
Kepler CCD Array
Publication
2016-06
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at K2 (12 shown).
Host System: K2-29
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,358 K — cooler than the Sun (5,778 K)
Estimated Age
2.60 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.860 R☉
Stellar Mass
0.940 M☉
Metallicity [Fe/H]
0.16
Extended Stellar Properties
Surface gravity (log g)
4.540 dex
Stellar density
2.900 g/cm³
Systemic radial velocity
32.88 km/s
Rotational v·sin i
3.70 km/s
Rotation period
10.79 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
5.575 mas
Total Proper Motion
27.461 mas/yr
PM Right Ascension
16.45 mas/yr
PM Declination
-21.99 mas/yr
Galactic Cartesian (pc)
x = 0.418 · y = 0.809 · z = 0.413
Equatorial (J2000)
RA 62.67042° · Dec 24.40166°
Galactic ℓ, b
170.514° · -19.550°
Ecliptic λ, β
65.238° · 3.281°
HTM-20 index
46602455
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