Key parameters at a glance
- A radius of 1.50 Earth radii
- A mass of 2.86 Earth masses
- Surface gravity around 1.27 g
- An orbital period of 5.614 days
- Semi-major axis 0.0590 AU
- Equilibrium temperature 1,165 K (892 °C)
- Distance from Earth 3,453.08 light-years
- Earth Similarity Index 0.252
- Travel time at Voyager 1 speed 60,895,041 years
2 siblings around Kepler-394
Kepler-394 d shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-394 d this | Super-Earth | 1.50 | 2.86 | 5.614 | 1,165 | 2021 |
| Kepler-394 b | Super-Earth | 1.60 | 3.19 | 8.005 | 1,035 | 2014 |
| Kepler-394 c | Super-Earth | 1.66 | 3.39 | 12.131 | 901 | 2014 |
Kepler-394 d Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#746of 1176
top 63.4%
This planet
1.50R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-394 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.50 | 11.21 |
| Mass (M⊕) | 1.00 | 2.86 | 317.83 |
| Density (g/cm³) | 5.51 | 4.65 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.27 | 2.53 |
| Insolation (S⊕) | 1.00 | 302.00 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 27777414
Gaia DR2
Gaia DR2 2135378231142791808
Gaia DR3
Gaia DR3 2135378231142791808
System
Kepler-394
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.61 Earth days (1.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0590 AU.
Transit Fingerprint
Depth
0.016 %
Duration
2.950 h
Impact parameter b
0.262
Rp / R★
0.011749
Transit midpoint (BJD)
2,454,964.8167
Photometric dip
Transit produces a flux drop of 162 ppm lasting ≈ 2.95 h.
Extended Orbital Architecture
Planet / star radius ratio
0.011749
Semi-major axis / stellar radius
14.840
Impact parameter (b)
0.262
Transit mid-time (BJD)
2,454,964.8167
Angular separation (arcsec)
0.05580
Eq. Temperature
1,165K
(892 °C)
Insolation (S⊕)
302.00
Earth = 1.00
Earth Similarity (ESI)
0.252
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
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-394
Spectral Class
F-type yellow-white
Effective Temperature
6,398 K — hotter than the Sun (5,778 K)
Estimated Age
0.25 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.101 R☉
Stellar Mass
1.141 M☉
Metallicity [Fe/H]
-0.14
Extended Stellar Properties
Surface gravity (log g)
4.411 dex
Stellar density
1.964 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.916 mas
Total Proper Motion
4.829 mas/yr
PM Right Ascension
3.22 mas/yr
PM Declination
-3.60 mas/yr
Galactic Cartesian (pc)
x = 0.281 · y = -0.568 · z = 0.774
Equatorial (J2000)
RA 296.30198° · Dec 50.67231°
Galactic ℓ, b
83.726° · 12.803°
Ecliptic λ, β
322.743° · 69.341°
HTM-20 index
-17145068
Similar Worlds
Kepler-915 b
Super-Earth · F-type yellow-white
Radius 1.50 R⊕ · 2,769.2 ly
Kepler-194 b
Super-Earth · F-type yellow-white
Radius 1.51 R⊕ · 3,581.1 ly
Kepler-1209 b
Super-Earth · F-type yellow-white
Radius 1.51 R⊕ · 1,648.8 ly
Kepler-1256 b
Super-Earth · F-type yellow-white
Radius 1.49 R⊕ · 2,906.7 ly
Kepler-1913 b
Super-Earth · F-type yellow-white
Radius 1.52 R⊕ · 2,858.1 ly
Kepler-126 b
Super-Earth · F-type yellow-white
Radius 1.52 R⊕ · 774.3 ly