Key parameters at a glance
- A radius of 1.10 Earth radii
- A mass of 4.10 Earth masses
- Surface gravity around 3.39 g
- An orbital period of 11.868 days
- Semi-major axis 0.0994 AU
- Equilibrium temperature 864 K (591 °C)
- Distance from Earth 3,793.91 light-years
- Earth Similarity Index 0.330
- Travel time at Voyager 1 speed 66,905,631 years
1 sibling around Kepler-59
Kepler-59 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 |
|---|---|---|---|---|---|---|
| Kepler-59 b this | Rocky Terrestrial | 1.10 | 4.10 | 11.868 | 864 | 2012 |
| Kepler-59 c | Super-Earth | 1.98 | 3.81 | 17.980 | 752 | 2012 |
Kepler-59 b Planet Profile
Physical Specs
Classification
Planet Type
Rocky Terrestrial
Discovery
Size rank in cohort
Rank by radius
#224of 570
top 39.1%
This planet
1.10R⊕
Rocky Terrestrial median
1.01R⊕
Nearest-size peers
| Metric | Earth | Kepler-59 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.10 | 11.21 |
| Mass (M⊕) | 1.00 | 4.10 | 317.83 |
| Density (g/cm³) | 5.51 | 8.70 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.39 | 2.53 |
| Insolation (S⊕) | 1.00 | 187.51 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 4.100 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 158393923
Gaia DR2
Gaia DR2 2130625287187139072
Gaia DR3
Gaia DR3 2130625287187139072
System
Kepler-59
Percentile among Rocky Terrestrial cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 11.87 Earth days (3.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0994 AU.
Transit Fingerprint
Depth
0.010 %
Duration
5.977 h
Impact parameter b
0.729
Rp / R★
0.010650
Transit midpoint (BJD)
2,454,970.7477
Photometric dip
Transit produces a flux drop of 102 ppm lasting ≈ 5.98 h.
Extended Orbital Architecture
Planet / star radius ratio
0.010650
Semi-major axis / stellar radius
8.600
Impact parameter (b)
0.729
Transit mid-time (BJD)
2,454,970.7477
Angular separation (arcsec)
0.08550
Eq. Temperature
864K
(591 °C)
Insolation (S⊕)
187.51
Earth = 1.00
Earth Similarity (ESI)
0.330
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
Steffen et al. 2013Instrument
Kepler CCD Array
Publication
2013-01
Observation locale
Space
Discovery cohort
Planets confirmed in 2012 at Kepler (12 shown).
Host System: Kepler-59
Spectral Class
F-type yellow-white
Effective Temperature
6,074 K — hotter than the Sun (5,778 K)
Estimated Age
0.26 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.940 R☉
Stellar Mass
1.040 M☉
Metallicity [Fe/H]
-0.20
Extended Stellar Properties
Surface gravity (log g)
4.510 dex
Stellar density
0.390 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.831 mas
Total Proper Motion
10.501 mas/yr
PM Right Ascension
-0.39 mas/yr
PM Declination
10.49 mas/yr
Galactic Cartesian (pc)
x = 0.201 · y = -0.656 · z = 0.727
Equatorial (J2000)
RA 287.03949° · Dec 46.64017°
Galactic ℓ, b
77.303° · 16.678°
Ecliptic λ, β
302.723° · 68.152°
HTM-20 index
-1674500869
Similar Worlds
Kepler-1084 b
Rocky Terrestrial · F-type yellow-white
Radius 1.11 R⊕ · 1,322.7 ly
Kepler-1531 b
Rocky Terrestrial · F-type yellow-white
Radius 1.11 R⊕ · 2,173.3 ly
Kepler-1589 b
Rocky Terrestrial · F-type yellow-white
Radius 1.09 R⊕ · 4,935.2 ly
Kepler-431 d
Rocky Terrestrial · F-type yellow-white
Radius 1.11 R⊕ · 1,586.9 ly
Kepler-1434 b
Rocky Terrestrial · F-type yellow-white
Radius 1.11 R⊕ · 2,529.4 ly
Kepler-1288 b
Rocky Terrestrial · F-type yellow-white
Radius 1.12 R⊕ · 2,655.2 ly