Key parameters at a glance
- A radius of 1.72 Earth radii
- A mass of 3.61 Earth masses
- Surface gravity around 1.22 g
- An orbital period of 14.751 days
- Semi-major axis 0.1180 AU
- Equilibrium temperature 678 K (405 °C)
- Distance from Earth 2,650.10 light-years
- Earth Similarity Index 0.427
- Travel time at Voyager 1 speed 46,734,436 years
1 sibling around Kepler-404
Kepler-404 c 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 | Super-Earth | 1.27 | 2.15 | 11.830 | 730 | 2014 |
| Kepler-404 c this | Super-Earth | 1.72 | 3.61 | 14.751 | 678 | 2014 |
Kepler-404 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#373of 1176
top 31.6%
This planet
1.72R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-404 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.72 | 11.21 |
| Mass (M⊕) | 1.00 | 3.61 | 317.83 |
| Density (g/cm³) | 5.51 | 3.90 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.22 | 2.53 |
| Insolation (S⊕) | 1.00 | 33.15 | 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 14.75 Earth days (4.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1180 AU.
Transit Fingerprint
Depth
0.026 %
Duration
1.166 h
Impact parameter b
0.850
Rp / R★
0.017404
Transit midpoint (BJD)
2,454,970.1376
Photometric dip
Transit produces a flux drop of 261 ppm lasting ≈ 1.17 h.
Extended Orbital Architecture
Planet / star radius ratio
0.017404
Semi-major axis / stellar radius
41.000
Impact parameter (b)
0.850
Transit mid-time (BJD)
2,454,970.1376
Angular separation (arcsec)
0.14500
Eq. Temperature
678K
(405 °C)
Insolation (S⊕)
33.15
Earth = 1.00
Earth Similarity (ESI)
0.427
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-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
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Kepler-160 b
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K2-58 d
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Radius 1.71 R⊕ · 592.8 ly