Key parameters at a glance
- A radius of 1.53 Earth radii
- A mass of 6.75 Earth masses
- Surface gravity around 2.88 g
- An orbital period of 3.072 days
- Semi-major axis 0.0372 AU
- Equilibrium temperature 722 K (449 °C)
- Distance from Earth 1,204.99 light-years
- Earth Similarity Index 0.395
- Travel time at Voyager 1 speed 21,249,938 years
- Almost certainly tidally locked to its host star given the close orbit
5 siblings around Kepler-80
Kepler-80 d shares its host star with 5 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-80 f | Rocky Terrestrial | 1.21 | 4,459.73 | 0.987 | 1,054 | 2016 |
| Kepler-80 d this | Super-Earth | 1.53 | 6.75 | 3.072 | 722 | 2014 |
| Kepler-80 e | Super-Earth | 1.60 | 4.13 | 4.645 | 629 | 2014 |
| Kepler-80 b | Sub-Neptune | 2.67 | 6.93 | 7.052 | 547 | 2012 |
| Kepler-80 c | Sub-Neptune | 2.74 | 6.74 | 9.524 | 495 | 2012 |
| Kepler-80 g | Rocky Terrestrial | 1.13 | 0.07 | 14.646 | 418 | 2017 |
Kepler-80 d Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#687of 1176
top 58.3%
This planet
1.53R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-80 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.53 | 11.21 |
| Mass (M⊕) | 1.00 | 6.75 | 317.83 |
| Density (g/cm³) | 5.51 | 7.04 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.88 | 2.53 |
| Insolation (S⊕) | 1.00 | 164.63 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 6.750 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 184296619
Gaia DR2
Gaia DR2 2076328963475704576
Gaia DR3
Gaia DR3 2076328963475704576
System
Kepler-80
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.07 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0372 AU.
Transit Fingerprint
Depth
0.054 %
Duration
1.873 h
Impact parameter b
0.192
Rp / R★
0.019140
Transit midpoint (BJD)
2,455,695.1290
Photometric dip
Transit produces a flux drop of 539 ppm lasting ≈ 1.87 h.
Extended Orbital Architecture
Planet / star radius ratio
0.019140
Semi-major axis / stellar radius
11.870
Impact parameter (b)
0.192
Transit mid-time (BJD)
2,455,695.1290
Long. of periastron (ω)
260.00°
Angular separation (arcsec)
0.10100
Eq. Temperature
722K
(449 °C)
Insolation (S⊕)
164.63
Earth = 1.00
Earth Similarity (ESI)
0.395
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.
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-80
Spectral Class
K-type orange
Effective Temperature
4,540 K — cooler than the Sun (5,778 K)
Estimated Age
2.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.678 R☉
Stellar Mass
0.730 M☉
Metallicity [Fe/H]
0.04
Extended Stellar Properties
Surface gravity (log g)
4.639 dex
Stellar density
2.330 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.678 mas
Total Proper Motion
7.316 mas/yr
PM Right Ascension
-1.38 mas/yr
PM Declination
-7.18 mas/yr
Galactic Cartesian (pc)
x = 0.337 · y = -0.688 · z = 0.643
Equatorial (J2000)
RA 296.11258° · Dec 39.97875°
Galactic ℓ, b
74.087° · 7.853°
Ecliptic λ, β
311.909° · 59.676°
HTM-20 index
-1092040752
Similar Worlds
Kepler-1356 b
Super-Earth · K-type orange
Radius 1.53 R⊕ · 2,756.8 ly
Kepler-1930 b
Super-Earth · K-type orange
Radius 1.53 R⊕ · 899.2 ly
TOI-2431 b
Super-Earth · K-type orange
Radius 1.53 R⊕ · 117.6 ly
K2-385 b
Super-Earth · K-type orange
Radius 1.54 R⊕ · 1,372.5 ly
Kepler-326 b
Super-Earth · K-type orange
Radius 1.52 R⊕ · 1,590.6 ly
Kepler-306 b
Super-Earth · K-type orange
Radius 1.52 R⊕ · 2,529.9 ly