Key parameters at a glance
- A radius of 2.85 Earth radii
- A mass of 8.50 Earth masses
- Surface gravity around 1.05 g
- An orbital period of 151.884 days
- Semi-major axis 0.5730 AU
- Equilibrium temperature 378 K (105 °C)
- Distance from Earth 2,075.80 light-years
- Earth Similarity Index 0.597
- Travel time at Voyager 1 speed 36,606,794 years
1 sibling around Kepler-201
Kepler-201 c 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 | Sub-Neptune | 2.46 | 6.62 | 25.672 | 683 | 2014 |
| Kepler-201 c this | Sub-Neptune | 2.85 | 8.50 | 151.884 | 378 | 2014 |
Kepler-201 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#685of 1978
top 34.6%
This planet
2.85R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-201 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.85 | 11.21 |
| Mass (M⊕) | 1.00 | 8.50 | 317.83 |
| Density (g/cm³) | 5.51 | 2.02 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.05 | 2.53 |
| Insolation (S⊕) | 1.00 | 6.03 | 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 151.88 Earth days (41.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.5730 AU.
Transit Fingerprint
Depth
0.036 %
Duration
12.990 h
Impact parameter b
0.920
Rp / R★
0.018810
Transit midpoint (BJD)
2,455,009.4182
Photometric dip
Transit produces a flux drop of 361 ppm lasting ≈ 12.99 h.
Extended Orbital Architecture
Planet / star radius ratio
0.018810
Semi-major axis / stellar radius
63.100
Impact parameter (b)
0.920
Transit mid-time (BJD)
2,455,009.4182
Angular separation (arcsec)
0.90000
Eq. Temperature
378K
(105 °C)
Insolation (S⊕)
6.03
Earth = 1.00
Earth Similarity (ESI)
0.597
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
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
TOI-480 b
Sub-Neptune · F-type yellow-white
Radius 2.85 R⊕ · 177.9 ly
Kepler-527 b
Sub-Neptune · F-type yellow-white
Radius 2.84 R⊕ · 2,446.3 ly
Kepler-410 A b
Sub-Neptune · F-type yellow-white
Radius 2.84 R⊕ · 481.2 ly
Kepler-1724 b
Sub-Neptune · F-type yellow-white
Radius 2.84 R⊕ · 3,459.8 ly
Kepler-880 c
Sub-Neptune · F-type yellow-white
Radius 2.87 R⊕ · 1,961.3 ly
KOI-351 d
Sub-Neptune · F-type yellow-white
Radius 2.87 R⊕ · 2,766.6 ly