Key parameters at a glance
- A radius of 1.66 Earth radii
- A mass of 3.38 Earth masses
- Surface gravity around 1.23 g
- An orbital period of 5.780 days
- Semi-major axis 0.0532 AU
- Equilibrium temperature 598 K (325 °C)
- Distance from Earth 1,360.12 light-years
- Earth Similarity Index 0.488
- Travel time at Voyager 1 speed 23,985,648 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1687 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#483of 1176
top 41.0%
This planet
1.66R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-1687 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.66 | 11.21 |
| Mass (M⊕) | 1.00 | 3.38 | 317.83 |
| Density (g/cm³) | 5.51 | 4.09 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.23 | 2.53 |
| Insolation (S⊕) | 1.00 | 30.22 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 416281238
Gaia DR2
Gaia DR2 2133086887563878912
Gaia DR3
Gaia DR3 2133086887563878912
System
Kepler-1687
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.78 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0532 AU.
Transit Fingerprint
Depth
0.040 %
Duration
2.521 h
Impact parameter b
0.759
Rp / R★
0.023676
Transit midpoint (BJD)
2,454,969.5304
Photometric dip
Transit produces a flux drop of 397 ppm lasting ≈ 2.52 h.
Extended Orbital Architecture
Planet / star radius ratio
0.023676
Semi-major axis / stellar radius
6.910
Impact parameter (b)
0.759
Transit mid-time (BJD)
2,454,969.5304
Angular separation (arcsec)
0.12800
Eq. Temperature
598K
(325 °C)
Insolation (S⊕)
30.22
Earth = 1.00
Earth Similarity (ESI)
0.488
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
Armstrong et al. 2021Instrument
Kepler CCD Array
Publication
2021-07
Observation locale
Space
Discovery cohort
Planets confirmed in 2020 at Kepler (12 shown).
Host System: Kepler-1687
Spectral Class
K-type orange
Effective Temperature
4,132 K — cooler than the Sun (5,778 K)
Estimated Age
3.73 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.726 R☉
Stellar Mass
0.650 M☉
Metallicity [Fe/H]
-0.14
Extended Stellar Properties
Surface gravity (log g)
4.529 dex
Stellar density
2.394 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.370 mas
Total Proper Motion
5.037 mas/yr
PM Right Ascension
4.21 mas/yr
PM Declination
2.76 mas/yr
Galactic Cartesian (pc)
x = 0.214 · y = -0.595 · z = 0.775
Equatorial (J2000)
RA 289.74284° · Dec 50.78706°
Galactic ℓ, b
82.014° · 16.610°
Ecliptic λ, β
311.929° · 71.363°
HTM-20 index
115933001
Similar Worlds
Kepler-1418 b
Super-Earth · K-type orange
Radius 1.66 R⊕ · 1,627.5 ly
Kepler-1977 b
Super-Earth · K-type orange
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K2-318 b
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K2-343 b
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Kepler-1795 b
Super-Earth · K-type orange
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TOI-871 b
Super-Earth · K-type orange
Radius 1.66 R⊕ · 221.9 ly