Key parameters at a glance
- A radius of 1.39 Earth radii
- A mass of 2.51 Earth masses
- Surface gravity around 1.30 g
- An orbital period of 4.577 days
- Semi-major axis 0.0436 AU
- Equilibrium temperature 567 K (294 °C)
- Distance from Earth 883.41 light-years
- Earth Similarity Index 0.541
- Travel time at Voyager 1 speed 15,578,874 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1904 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#939of 1176
top 79.8%
This planet
1.39R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-1904 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.39 | 11.21 |
| Mass (M⊕) | 1.00 | 2.51 | 317.83 |
| Density (g/cm³) | 5.51 | 5.13 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.30 | 2.53 |
| Insolation (S⊕) | 1.00 | 24.38 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 299089587
Gaia DR2
Gaia DR2 2133344104564365184
Gaia DR3
Gaia DR3 2133344104564365184
System
Kepler-1904
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.58 Earth days (1.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0436 AU.
Transit Fingerprint
Depth
0.071 %
Duration
0.949 h
Impact parameter b
0.327
Rp / R★
0.024527
Transit midpoint (BJD)
2,454,965.0992
Photometric dip
Transit produces a flux drop of 710 ppm lasting ≈ 0.95 h.
Extended Orbital Architecture
Planet / star radius ratio
0.024527
Semi-major axis / stellar radius
38.200
Impact parameter (b)
0.327
Transit mid-time (BJD)
2,454,965.0992
Angular separation (arcsec)
0.16100
Eq. Temperature
567K
(294 °C)
Insolation (S⊕)
24.38
Earth = 1.00
Earth Similarity (ESI)
0.541
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-1904
Spectral Class
K-type orange
Effective Temperature
3,805 K — cooler than the Sun (5,778 K)
Estimated Age
5.83 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.497 R☉
Stellar Mass
0.526 M☉
Metallicity [Fe/H]
-0.10
Extended Stellar Properties
Surface gravity (log g)
4.767 dex
Stellar density
41.380 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
3.663 mas
Total Proper Motion
23.450 mas/yr
PM Right Ascension
5.38 mas/yr
PM Declination
22.82 mas/yr
Galactic Cartesian (pc)
x = 0.203 · y = -0.594 · z = 0.779
Equatorial (J2000)
RA 288.87440° · Dec 51.15422°
Galactic ℓ, b
82.151° · 17.256°
Ecliptic λ, β
310.838° · 71.925°
HTM-20 index
268327061
Similar Worlds
Kepler-224 b
Super-Earth · K-type orange
Radius 1.39 R⊕ · 2,550.8 ly
Kepler-386 b
Super-Earth · K-type orange
Radius 1.39 R⊕ · 2,878.2 ly
Kepler-1761 b
Super-Earth · K-type orange
Radius 1.39 R⊕ · 721.4 ly
Kepler-716 c
Super-Earth · K-type orange
Radius 1.39 R⊕ · 2,071.1 ly
Kepler-1301 b
Super-Earth · K-type orange
Radius 1.40 R⊕ · 2,786.3 ly
K2-85 b
Super-Earth · K-type orange
Radius 1.40 R⊕ · 317.1 ly