Key parameters at a glance
- A radius of 1.51 Earth radii
- A mass of 2.90 Earth masses
- Surface gravity around 1.27 g
- An orbital period of 3.757 days
- Semi-major axis 0.0444 AU
- Equilibrium temperature 877 K (604 °C)
- Distance from Earth 1,335.94 light-years
- Earth Similarity Index 0.343
- Travel time at Voyager 1 speed 23,559,327 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1809 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#727of 1176
top 61.7%
This planet
1.51R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-1809 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.51 | 11.21 |
| Mass (M⊕) | 1.00 | 2.90 | 317.83 |
| Density (g/cm³) | 5.51 | 4.60 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.27 | 2.53 |
| Insolation (S⊕) | 1.00 | 158.20 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 122300177
Gaia DR2
Gaia DR2 2101194109695286272
Gaia DR3
Gaia DR3 2101194109695286272
System
Kepler-1809
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.76 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0444 AU.
Transit Fingerprint
Depth
0.026 %
Duration
0.921 h
Impact parameter b
0.019
Rp / R★
0.014476
Transit midpoint (BJD)
2,454,966.9604
Photometric dip
Transit produces a flux drop of 259 ppm lasting ≈ 0.92 h.
Extended Orbital Architecture
Planet / star radius ratio
0.014476
Semi-major axis / stellar radius
31.630
Impact parameter (b)
0.019
Transit mid-time (BJD)
2,454,966.9604
Angular separation (arcsec)
0.10800
Eq. Temperature
877K
(604 °C)
Insolation (S⊕)
158.20
Earth = 1.00
Earth Similarity (ESI)
0.343
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
Valizadegan et al. 2022Instrument
Kepler CCD Array
Publication
2022-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Kepler (12 shown).
Host System: Kepler-1809
Spectral Class
K-type orange
Effective Temperature
4,901 K — cooler than the Sun (5,778 K)
Estimated Age
1.55 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.716 R☉
Stellar Mass
0.807 M☉
Metallicity [Fe/H]
0.04
Extended Stellar Properties
Surface gravity (log g)
4.618 dex
Stellar density
22.783 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.413 mas
Total Proper Motion
42.444 mas/yr
PM Right Ascension
-25.71 mas/yr
PM Declination
-33.77 mas/yr
Galactic Cartesian (pc)
x = 0.263 · y = -0.713 · z = 0.650
Equatorial (J2000)
RA 290.26517° · Dec 40.54849°
Galactic ℓ, b
72.526° · 12.079°
Ecliptic λ, β
303.644° · 61.641°
HTM-20 index
-1011451963
Similar Worlds
HD 219134 c
Super-Earth · K-type orange
Radius 1.51 R⊕ · 21.3 ly
Kepler-828 b
Super-Earth · K-type orange
Radius 1.51 R⊕ · 1,876.4 ly
Kepler-1324 b
Super-Earth · K-type orange
Radius 1.51 R⊕ · 1,571.0 ly
K2-141 b
Super-Earth · K-type orange
Radius 1.51 R⊕ · 201.8 ly
Kepler-1853 b
Super-Earth · K-type orange
Radius 1.52 R⊕ · 1,834.1 ly
Kepler-326 b
Super-Earth · K-type orange
Radius 1.52 R⊕ · 1,590.6 ly