Key parameters at a glance
- A radius of 2.02 Earth radii
- A mass of 4.74 Earth masses
- Surface gravity around 1.16 g
- An orbital period of 18.755 days
- Semi-major axis 0.1139 AU
- Equilibrium temperature 382 K (109 °C)
- Distance from Earth 1,524.36 light-years
- Earth Similarity Index 0.673
- Travel time at Voyager 1 speed 26,882,004 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-833 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1927of 1978
top 97.4%
This planet
2.02R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-833 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.02 | 11.21 |
| Mass (M⊕) | 1.00 | 4.74 | 317.83 |
| Density (g/cm³) | 5.51 | 3.16 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.16 | 2.53 |
| Insolation (S⊕) | 1.00 | 8.31 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 159397031
Gaia DR2
Gaia DR2 2127461236320786688
Gaia DR3
Gaia DR3 2127461236320786688
System
Kepler-833
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 18.75 Earth days (5.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1139 AU.
Transit Fingerprint
Depth
0.100 %
Duration
3.068 h
Impact parameter b
0.034
Rp / R★
0.029667
Transit midpoint (BJD)
2,454,974.7156
Photometric dip
Transit produces a flux drop of 995 ppm lasting ≈ 3.07 h.
Extended Orbital Architecture
Planet / star radius ratio
0.029667
Semi-major axis / stellar radius
48.550
Impact parameter (b)
0.034
Transit mid-time (BJD)
2,454,974.7156
Angular separation (arcsec)
0.24400
Eq. Temperature
382K
(109 °C)
Insolation (S⊕)
8.31
Earth = 1.00
Earth Similarity (ESI)
0.673
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Morton et al. 2016Instrument
Kepler CCD Array
Publication
2016-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at Kepler (12 shown).
Host System: Kepler-833
Spectral Class
K-type orange
Effective Temperature
4,339 K — cooler than the Sun (5,778 K)
Estimated Age
3.72 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.620 R☉
Stellar Mass
0.640 M☉
Metallicity [Fe/H]
-0.18
Extended Stellar Properties
Surface gravity (log g)
4.670 dex
Stellar density
5.886 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.111 mas
Total Proper Motion
23.820 mas/yr
PM Right Ascension
-8.96 mas/yr
PM Declination
-22.07 mas/yr
Galactic Cartesian (pc)
x = 0.245 · y = -0.655 · z = 0.714
Equatorial (J2000)
RA 290.47991° · Dec 45.60058°
Galactic ℓ, b
77.293° · 14.076°
Ecliptic λ, β
307.660° · 66.382°
HTM-20 index
1433135844
Similar Worlds
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TOI-544 b
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