Key parameters at a glance
- A radius of 3.11 Earth radii
- A mass of 9.85 Earth masses
- Surface gravity around 1.02 g
- An orbital period of 23.638 days
- Semi-major axis 0.1580 AU
- Equilibrium temperature 595 K (322 °C)
- Distance from Earth 1,699.45 light-years
- Earth Similarity Index 0.388
- Travel time at Voyager 1 speed 29,969,779 years
1 sibling around Kepler-199
Kepler-199 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-199 b this | Sub-Neptune | 3.11 | 9.85 | 23.638 | 595 | 2014 |
| Kepler-199 c | Sub-Neptune | 3.25 | 10.60 | 67.093 | 420 | 2014 |
Kepler-199 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#426of 1978
top 21.5%
This planet
3.11R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-199 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.11 | 11.21 |
| Mass (M⊕) | 1.00 | 9.85 | 317.83 |
| Density (g/cm³) | 5.51 | 1.80 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.02 | 2.53 |
| Insolation (S⊕) | 1.00 | 31.68 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 184090767
Gaia DR2
Gaia DR2 2076391669999950720
Gaia DR3
Gaia DR3 2076391669999950720
System
Kepler-199
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 23.64 Earth days (6.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1580 AU.
Transit Fingerprint
Depth
0.117 %
Duration
4.954 h
Impact parameter b
0.150
Rp / R★
0.029550
Transit midpoint (BJD)
2,455,005.6485
Photometric dip
Transit produces a flux drop of 1,171 ppm lasting ≈ 4.95 h.
Extended Orbital Architecture
Planet / star radius ratio
0.029550
Semi-major axis / stellar radius
37.075
Impact parameter (b)
0.150
Transit mid-time (BJD)
2,455,005.6485
Angular separation (arcsec)
0.30300
Eq. Temperature
595K
(322 °C)
Insolation (S⊕)
31.68
Earth = 1.00
Earth Similarity (ESI)
0.388
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-199
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,644 K — cooler than the Sun (5,778 K)
Estimated Age
1.45 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.967 R☉
Stellar Mass
0.960 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.438 dex
Stellar density
1.300 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 15 bands
Astrometric Data
Parallax
1.890 mas
Total Proper Motion
4.026 mas/yr
PM Right Ascension
-1.94 mas/yr
PM Declination
-3.53 mas/yr
Galactic Cartesian (pc)
x = 0.329 · y = -0.689 · z = 0.646
Equatorial (J2000)
RA 295.55943° · Dec 40.23625°
Galactic ℓ, b
74.108° · 8.347°
Ecliptic λ, β
311.296° · 60.064°
HTM-20 index
-1515937698
Similar Worlds
Kepler-692 b
Sub-Neptune · G-type yellow (Sun-like)
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Kepler-227 b
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Kepler-1721 b
Sub-Neptune · G-type yellow (Sun-like)
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Kepler-1820 b
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HD 93963 A c
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Radius 3.12 R⊕ · 268.6 ly
Kepler-656 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.12 R⊕ · 2,903.9 ly