Key parameters at a glance
- A radius of 2.13 Earth radii
- A mass of 5.18 Earth masses
- Surface gravity around 1.14 g
- An orbital period of 8.595 days
- Semi-major axis 0.0800 AU
- Equilibrium temperature 854 K (581 °C)
- Distance from Earth 2,171.91 light-years
- Earth Similarity Index 0.314
- Travel time at Voyager 1 speed 38,301,665 years
1 sibling around Kepler-200
Kepler-200 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-200 b this | Sub-Neptune | 2.13 | 5.18 | 8.595 | 854 | 2014 |
| Kepler-200 c | Super-Earth | 1.59 | 3.15 | 10.222 | 806 | 2014 |
Kepler-200 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1765of 1978
top 89.2%
This planet
2.13R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-200 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.13 | 11.21 |
| Mass (M⊕) | 1.00 | 5.18 | 317.83 |
| Density (g/cm³) | 5.51 | 2.95 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.14 | 2.53 |
| Insolation (S⊕) | 1.00 | 159.07 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 120252452
Gaia DR2
Gaia DR2 2103671481186902912
Gaia DR3
Gaia DR3 2103671481186902912
System
Kepler-200
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.59 Earth days (2.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0800 AU.
Transit Fingerprint
Depth
0.034 %
Duration
3.534 h
Impact parameter b
0.930
Rp / R★
0.018200
Transit midpoint (BJD)
2,455,004.6300
Photometric dip
Transit produces a flux drop of 337 ppm lasting ≈ 3.53 h.
Extended Orbital Architecture
Planet / star radius ratio
0.018200
Semi-major axis / stellar radius
7.990
Impact parameter (b)
0.930
Transit mid-time (BJD)
2,455,004.6300
Angular separation (arcsec)
0.12000
Eq. Temperature
854K
(581 °C)
Insolation (S⊕)
159.07
Earth = 1.00
Earth Similarity (ESI)
0.314
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-200
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,678 K — cooler than the Sun (5,778 K)
Estimated Age
6.30 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.944 R☉
Stellar Mass
0.972 M☉
Metallicity [Fe/H]
-0.01
Extended Stellar Properties
Surface gravity (log g)
4.454 dex
Stellar density
1.080 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.473 mas
Total Proper Motion
9.498 mas/yr
PM Right Ascension
5.52 mas/yr
PM Declination
7.73 mas/yr
Galactic Cartesian (pc)
x = 0.187 · y = -0.728 · z = 0.659
Equatorial (J2000)
RA 284.40995° · Dec 41.23749°
Galactic ℓ, b
71.339° · 16.408°
Ecliptic λ, β
294.741° · 63.444°
HTM-20 index
1887743735
Similar Worlds
Kepler-1504 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.13 R⊕ · 7,945.0 ly
Kepler-971 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.13 R⊕ · 1,104.1 ly
Kepler-1777 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.13 R⊕ · 2,019.4 ly
K2-215 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.12 R⊕ · 1,317.6 ly
Kepler-984 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.12 R⊕ · 1,500.9 ly
Kepler-479 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.12 R⊕ · 1,124.9 ly