Key parameters at a glance
- A radius of 4.66 Earth radii
- A mass of 19.60 Earth masses
- Surface gravity around 0.90 g
- An orbital period of 29.727 days
- Semi-major axis 0.1880 AU
- Equilibrium temperature 557 K (284 °C)
- Distance from Earth 3,473.82 light-years
- Earth Similarity Index 0.347
- Travel time at Voyager 1 speed 61,260,853 years
1 sibling around Kepler-405
Kepler-405 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-405 b | Sub-Neptune | 2.08 | 4.98 | 10.614 | 785 | 2014 |
| Kepler-405 c this | Neptune-like | 4.66 | 19.60 | 29.727 | 557 | 2014 |
Kepler-405 c Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#437of 574
top 76.0%
This planet
4.66R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | Kepler-405 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 4.66 | 11.21 |
| Mass (M⊕) | 1.00 | 19.60 | 317.83 |
| Density (g/cm³) | 5.51 | 1.06 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.90 | 2.53 |
| Insolation (S⊕) | 1.00 | 14.09 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 137150544
Gaia DR2
Gaia DR2 2052726984308676864
Gaia DR3
Gaia DR3 2052726984308676864
System
Kepler-405
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 29.73 Earth days (8.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1880 AU.
Transit Fingerprint
Depth
0.101 %
Duration
1.534 h
Impact parameter b
0.880
Rp / R★
0.040071
Transit midpoint (BJD)
2,456,560.2040
Photometric dip
Transit produces a flux drop of 1,010 ppm lasting ≈ 1.53 h.
Extended Orbital Architecture
Planet / star radius ratio
0.040071
Semi-major axis / stellar radius
25.000
Impact parameter (b)
0.880
Transit mid-time (BJD)
2,456,560.2040
Angular separation (arcsec)
0.17700
Eq. Temperature
557K
(284 °C)
Insolation (S⊕)
14.09
Earth = 1.00
Earth Similarity (ESI)
0.347
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-405
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,818 K — hotter than the Sun (5,778 K)
Estimated Age
2.09 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.893 R☉
Stellar Mass
0.873 M☉
Metallicity [Fe/H]
-0.06
Extended Stellar Properties
Surface gravity (log g)
4.536 dex
Stellar density
1.650 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
0.912 mas
Total Proper Motion
1.733 mas/yr
PM Right Ascension
-0.86 mas/yr
PM Declination
-1.51 mas/yr
Galactic Cartesian (pc)
x = 0.286 · y = -0.730 · z = 0.620
Equatorial (J2000)
RA 291.40946° · Dec 38.34001°
Galactic ℓ, b
70.898° · 10.316°
Ecliptic λ, β
304.075° · 59.272°
HTM-20 index
2137838697
Similar Worlds
K2-390 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.66 R⊕ · 1,487.7 ly
Kepler-47 c
Neptune-like · G-type yellow (Sun-like)
Radius 4.65 R⊕ · 3,343.2 ly
Kepler-222 c
Neptune-like · G-type yellow (Sun-like)
Radius 4.64 R⊕ · 2,475.0 ly
Kepler-867 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.64 R⊕ · 3,899.3 ly
Kepler-564 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.63 R⊕ · 2,814.8 ly
TOI-1136 d
Neptune-like · G-type yellow (Sun-like)
Radius 4.63 R⊕ · 275.7 ly