Key parameters at a glance
- A radius of 1.27 Earth radii
- A mass of 2.15 Earth masses
- Surface gravity around 1.33 g
- An orbital period of 11.830 days
- Semi-major axis 0.1020 AU
- Equilibrium temperature 730 K (457 °C)
- Distance from Earth 2,650.10 light-years
- Earth Similarity Index 0.430
- Travel time at Voyager 1 speed 46,734,436 years
1 sibling around Kepler-404
Kepler-404 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-404 b this | Super-Earth | 1.27 | 2.15 | 11.830 | 730 | 2014 |
| Kepler-404 c | Super-Earth | 1.72 | 3.61 | 14.751 | 678 | 2014 |
Kepler-404 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#1135of 1176
top 96.4%
This planet
1.27R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-404 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.27 | 11.21 |
| Mass (M⊕) | 1.00 | 2.15 | 317.83 |
| Density (g/cm³) | 5.51 | 5.77 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.33 | 2.53 |
| Insolation (S⊕) | 1.00 | 44.53 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 158268972
Gaia DR2
Gaia DR2 2106431392811409536
Gaia DR3
Gaia DR3 2106431392811409536
System
Kepler-404
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 11.83 Earth days (3.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1020 AU.
Transit Fingerprint
Depth
0.019 %
Duration
5.635 h
Impact parameter b
0.560
Rp / R★
0.012612
Transit midpoint (BJD)
2,454,970.6176
Photometric dip
Transit produces a flux drop of 191 ppm lasting ≈ 5.64 h.
Extended Orbital Architecture
Planet / star radius ratio
0.012612
Semi-major axis / stellar radius
26.470
Impact parameter (b)
0.560
Transit mid-time (BJD)
2,454,970.6176
Angular separation (arcsec)
0.12600
Eq. Temperature
730K
(457 °C)
Insolation (S⊕)
44.53
Earth = 1.00
Earth Similarity (ESI)
0.430
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Transit timing variations
Gravitational interactions from neighbours have been detected.
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-404
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,654 K — cooler than the Sun (5,778 K)
Estimated Age
1.35 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.884 R☉
Stellar Mass
0.860 M☉
Metallicity [Fe/H]
-0.03
Extended Stellar Properties
Surface gravity (log g)
4.543 dex
Stellar density
1.780 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.202 mas
Total Proper Motion
6.655 mas/yr
PM Right Ascension
-5.58 mas/yr
PM Declination
-3.63 mas/yr
Galactic Cartesian (pc)
x = 0.198 · y = -0.674 · z = 0.711
Equatorial (J2000)
RA 286.39858° · Dec 45.34352°
Galactic ℓ, b
75.875° · 16.603°
Ecliptic λ, β
300.585° · 67.050°
HTM-20 index
-1977940394
Similar Worlds
Kepler-181 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.27 R⊕ · 1,987.2 ly
Kepler-85 e
Super-Earth · G-type yellow (Sun-like)
Radius 1.27 R⊕ · 2,495.2 ly
Kepler-1372 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.27 R⊕ · 4,250.5 ly
Kepler-831 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.27 R⊕ · 1,935.9 ly
K2-169 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.27 R⊕ · 769.3 ly
K2-158 c
Super-Earth · G-type yellow (Sun-like)
Radius 1.28 R⊕ · 643.5 ly