Key parameters at a glance
- A radius of 1.71 Earth radii
- A mass of 3.57 Earth masses
- Surface gravity around 1.22 g
- An orbital period of 14.383 days
- Semi-major axis 0.1220 AU
- Equilibrium temperature 889 K (616 °C)
- Distance from Earth 3,149.23 light-years
- Earth Similarity Index 0.325
- Travel time at Voyager 1 speed 55,536,701 years
2 siblings around Kepler-401
Kepler-401 b 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-401 b this | Super-Earth | 1.71 | 3.57 | 14.383 | 889 | 2014 |
| Kepler-401 c | Sub-Neptune | 2.15 | 5.27 | 47.318 | 598 | 2014 |
| Kepler-401 d | Sub-Neptune | 2.27 | 5.77 | 184.256 | 380 | 2016 |
Kepler-401 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#385of 1176
top 32.7%
This planet
1.71R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-401 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.71 | 11.21 |
| Mass (M⊕) | 1.00 | 3.57 | 317.83 |
| Density (g/cm³) | 5.51 | 3.92 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.22 | 2.53 |
| Insolation (S⊕) | 1.00 | 254.25 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 267746315
Gaia DR2
Gaia DR2 2133178765503484160
Gaia DR3
Gaia DR3 2133178765503484160
System
Kepler-401
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 14.38 Earth days (3.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1220 AU.
Transit Fingerprint
Depth
0.018 %
Duration
8.729 h
Impact parameter b
0.540
Rp / R★
0.011961
Transit midpoint (BJD)
2,454,973.5597
Photometric dip
Transit produces a flux drop of 179 ppm lasting ≈ 8.73 h.
Extended Orbital Architecture
Planet / star radius ratio
0.011961
Semi-major axis / stellar radius
12.370
Impact parameter (b)
0.540
Transit mid-time (BJD)
2,454,973.5597
Angular separation (arcsec)
0.12600
Eq. Temperature
889K
(616 °C)
Insolation (S⊕)
254.25
Earth = 1.00
Earth Similarity (ESI)
0.325
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Discovery Paper
Primary reference
Rowe et al. 2014Instrument
Kepler CCD Array
Publication
2014-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
Host System: Kepler-401
Spectral Class
F-type yellow-white
Effective Temperature
6,117 K — hotter than the Sun (5,778 K)
Estimated Age
3.55 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.333 R☉
Stellar Mass
1.173 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.254 dex
Stellar density
0.250 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.007 mas
Total Proper Motion
10.908 mas/yr
PM Right Ascension
-1.26 mas/yr
PM Declination
-10.83 mas/yr
Galactic Cartesian (pc)
x = 0.217 · y = -0.593 · z = 0.776
Equatorial (J2000)
RA 290.08275° · Dec 50.86344°
Galactic ℓ, b
82.174° · 16.442°
Ecliptic λ, β
312.638° · 71.341°
HTM-20 index
241941821
Similar Worlds
Kepler-1002 b
Super-Earth · F-type yellow-white
Radius 1.71 R⊕ · 1,331.7 ly
KOI-94 b
Super-Earth · F-type yellow-white
Radius 1.71 R⊕ · 1,555.9 ly
Kepler-1818 b
Super-Earth · F-type yellow-white
Radius 1.71 R⊕ · 3,374.4 ly
Kepler-1713 b
Super-Earth · F-type yellow-white
Radius 1.72 R⊕ · 963.1 ly
Kepler-341 c
Super-Earth · F-type yellow-white
Radius 1.70 R⊕ · 3,415.0 ly
Kepler-830 b
Super-Earth · F-type yellow-white
Radius 1.70 R⊕ · 3,659.5 ly