Key parameters at a glance
- A radius of 2.46 Earth radii
- A mass of 6.62 Earth masses
- Surface gravity around 1.09 g
- An orbital period of 25.672 days
- Semi-major axis 0.1750 AU
- Equilibrium temperature 683 K (410 °C)
- Distance from Earth 2,075.80 light-years
- Earth Similarity Index 0.373
- Travel time at Voyager 1 speed 36,606,794 years
1 sibling around Kepler-201
Kepler-201 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-201 b this | Sub-Neptune | 2.46 | 6.62 | 25.672 | 683 | 2014 |
| Kepler-201 c | Sub-Neptune | 2.85 | 8.50 | 151.884 | 378 | 2014 |
Kepler-201 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1245of 1978
top 62.9%
This planet
2.46R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-201 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.46 | 11.21 |
| Mass (M⊕) | 1.00 | 6.62 | 317.83 |
| Density (g/cm³) | 5.51 | 2.44 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.09 | 2.53 |
| Insolation (S⊕) | 1.00 | 64.55 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 138297190
Gaia DR2
Gaia DR2 2077386315701921920
Gaia DR3
Gaia DR3 2077386315701921920
System
Kepler-201
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 25.67 Earth days (7.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1750 AU.
Transit Fingerprint
Depth
0.039 %
Duration
5.627 h
Impact parameter b
0.380
Rp / R★
0.020470
Transit midpoint (BJD)
2,455,025.0971
Photometric dip
Transit produces a flux drop of 387 ppm lasting ≈ 5.63 h.
Extended Orbital Architecture
Planet / star radius ratio
0.020470
Semi-major axis / stellar radius
19.300
Impact parameter (b)
0.380
Transit mid-time (BJD)
2,455,025.0971
Angular separation (arcsec)
0.27500
Eq. Temperature
683K
(410 °C)
Insolation (S⊕)
64.55
Earth = 1.00
Earth Similarity (ESI)
0.373
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Discovery Paper
Primary reference
Rowe et al. 2014Instrument
Kepler CCD Array
Publication
2014-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
Host System: Kepler-201
Spectral Class
F-type yellow-white
Effective Temperature
6,065 K — hotter than the Sun (5,778 K)
Estimated Age
4.07 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.229 R☉
Stellar Mass
1.098 M☉
Metallicity [Fe/H]
-0.04
Extended Stellar Properties
Surface gravity (log g)
4.294 dex
Stellar density
0.580 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.543 mas
Total Proper Motion
6.318 mas/yr
PM Right Ascension
3.08 mas/yr
PM Declination
-5.52 mas/yr
Galactic Cartesian (pc)
x = 0.301 · y = -0.689 · z = 0.660
Equatorial (J2000)
RA 293.62606° · Dec 41.27280°
Galactic ℓ, b
74.339° · 10.127°
Ecliptic λ, β
309.192° · 61.536°
HTM-20 index
1416775318
Similar Worlds
Kepler-1632 b
Sub-Neptune · F-type yellow-white
Radius 2.47 R⊕ · 2,337.8 ly
HD 5278 b
Sub-Neptune · F-type yellow-white
Radius 2.45 R⊕ · 187.8 ly
K2-12 b
Sub-Neptune · F-type yellow-white
Radius 2.44 R⊕ · 1,064.5 ly
Kepler-758 b
Sub-Neptune · F-type yellow-white
Radius 2.48 R⊕ · 4,899.9 ly
HD 106315 b
Sub-Neptune · F-type yellow-white
Radius 2.44 R⊕ · 356.7 ly
TOI-4495 b
Sub-Neptune · F-type yellow-white
Radius 2.48 R⊕ · 431.2 ly