Key parameters at a glance
- A radius of 1.46 Earth radii
- A mass of 2.73 Earth masses
- Surface gravity around 1.28 g
- An orbital period of 0.631 days
- Semi-major axis 0.0131 AU
- Equilibrium temperature 1,322 K (1049 °C)
- Distance from Earth 1,046.96 light-years
- Earth Similarity Index 0.221
- Travel time at Voyager 1 speed 18,463,152 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-808 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#819of 1176
top 69.6%
This planet
1.46R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-808 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.46 | 11.21 |
| Mass (M⊕) | 1.00 | 2.73 | 317.83 |
| Density (g/cm³) | 5.51 | 4.82 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.28 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,428.30 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 26417717
Gaia DR2
Gaia DR2 2129330577887487744
Gaia DR3
Gaia DR3 2129330577887487744
System
Kepler-808
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts roughly 15.2 hours long on a nearly circular orbit at a mean orbital distance of 0.0131 AU.
Transit Fingerprint
Depth
0.043 %
Duration
1.108 h
Impact parameter b
0.120
Rp / R★
0.019060
Transit midpoint (BJD)
2,454,966.9440
Photometric dip
Transit produces a flux drop of 435 ppm lasting ≈ 1.11 h.
Extended Orbital Architecture
Planet / star radius ratio
0.019060
Semi-major axis / stellar radius
4.447
Impact parameter (b)
0.120
Transit mid-time (BJD)
2,454,966.9440
Angular separation (arcsec)
0.04090
Eq. Temperature
1,322K
(1049 °C)
Insolation (S⊕)
1,428.30
Earth = 1.00
Earth Similarity (ESI)
0.221
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. 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-808
Spectral Class
K-type orange
Effective Temperature
4,653 K — cooler than the Sun (5,778 K)
Estimated Age
1.95 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.710 R☉
Stellar Mass
0.760 M☉
Metallicity [Fe/H]
0.05
Extended Stellar Properties
Surface gravity (log g)
4.620 dex
Stellar density
1.950 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.914 mas
Total Proper Motion
19.445 mas/yr
PM Right Ascension
6.58 mas/yr
PM Declination
-18.30 mas/yr
Galactic Cartesian (pc)
x = 0.244 · y = -0.617 · z = 0.748
Equatorial (J2000)
RA 291.59415° · Dec 48.44549°
Galactic ℓ, b
80.289° · 14.571°
Ecliptic λ, β
312.304° · 68.735°
HTM-20 index
-722910847
Similar Worlds
Kepler-1019 b
Super-Earth · K-type orange
Radius 1.46 R⊕ · 633.3 ly
Kepler-190 c
Super-Earth · K-type orange
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Kepler-1039 b
Super-Earth · K-type orange
Radius 1.46 R⊕ · 1,001.0 ly
Kepler-1834 b
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TOI-1798.02
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Kepler-137 b
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Radius 1.47 R⊕ · 988.2 ly