Key parameters at a glance
- A radius of 1.60 Earth radii
- A mass of 3.18 Earth masses
- Surface gravity around 1.25 g
- An orbital period of 12.288 days
- Semi-major axis 0.1017 AU
- Equilibrium temperature 913 K (640 °C)
- Distance from Earth 1,417.00 light-years
- Earth Similarity Index 0.323
- Travel time at Voyager 1 speed 24,988,870 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1804 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#586of 1176
top 49.7%
This planet
1.60R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-1804 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.60 | 11.21 |
| Mass (M⊕) | 1.00 | 3.18 | 317.83 |
| Density (g/cm³) | 5.51 | 4.30 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.25 | 2.53 |
| Insolation (S⊕) | 1.00 | 164.61 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 185185751
Gaia DR2
Gaia DR2 2081919842663938688
Gaia DR3
Gaia DR3 2081919842663938688
System
Kepler-1804
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 12.29 Earth days (3.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1017 AU.
Transit Fingerprint
Depth
0.037 %
Duration
2.813 h
Impact parameter b
0.248
Rp / R★
0.017196
Transit midpoint (BJD)
2,454,974.6178
Photometric dip
Transit produces a flux drop of 367 ppm lasting ≈ 2.81 h.
Extended Orbital Architecture
Planet / star radius ratio
0.017196
Semi-major axis / stellar radius
32.940
Impact parameter (b)
0.248
Transit mid-time (BJD)
2,454,974.6178
Angular separation (arcsec)
0.23400
Eq. Temperature
913K
(640 °C)
Insolation (S⊕)
164.61
Earth = 1.00
Earth Similarity (ESI)
0.323
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-1804
Spectral Class
K-type orange
Effective Temperature
5,109 K — cooler than the Sun (5,778 K)
Estimated Age
14.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.671 R☉
Stellar Mass
0.929 M☉
Metallicity [Fe/H]
0.10
Extended Stellar Properties
Surface gravity (log g)
3.960 dex
Stellar density
2.384 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.273 mas
Total Proper Motion
0.780 mas/yr
PM Right Ascension
-0.35 mas/yr
PM Declination
0.70 mas/yr
Galactic Cartesian (pc)
x = 0.370 · y = -0.607 · z = 0.703
Equatorial (J2000)
RA 301.34287° · Dec 44.67218°
Galactic ℓ, b
80.138° · 6.888°
Ecliptic λ, β
323.110° · 62.453°
HTM-20 index
-1750075457
Similar Worlds
EPIC 212499991 b
Super-Earth · K-type orange
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Kepler-994 b
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Kepler-842 b
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Kepler-80 e
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Kepler-1702 b
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HD 219134 b
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Radius 1.60 R⊕ · 21.3 ly