Key parameters at a glance
- A radius of 3.28 Earth radii
- A mass of 10.80 Earth masses
- Surface gravity around 1.00 g
- An orbital period of 31.510 days
- Semi-major axis 0.1860 AU
- Equilibrium temperature 503 K (230 °C)
- Distance from Earth 501.22 light-years
- Earth Similarity Index 0.443
- Travel time at Voyager 1 speed 8,839,076 years
- Almost certainly tidally locked to its host star given the close orbit
3 siblings around Kepler-411
Kepler-411 e shares its host star with 3 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-411 b | Sub-Neptune | 2.40 | 25.60 | 3.005 | 1,138 | 2013 |
| Kepler-411 c | Neptune-like | 4.42 | 26.40 | 7.834 | 838 | 2016 |
| Kepler-411 e this | Sub-Neptune | 3.28 | 10.80 | 31.510 | 503 | 2018 |
| Kepler-411 d | Sub-Neptune | 3.32 | 15.20 | 58.020 | 410 | 2018 |
Kepler-411 e Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#291of 1978
top 14.7%
This planet
3.28R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-411 e | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.28 | 11.21 |
| Mass (M⊕) | 1.00 | 10.80 | 317.83 |
| Density (g/cm³) | 5.51 | 1.68 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.00 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 10.800 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 399954349
Gaia DR2
Gaia DR2 2132768952604988672
Gaia DR3
Gaia DR3 2132768956905956352
System
Kepler-411
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 31.51 Earth days (8.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1860 AU.
Eq. Temperature
503K
(230 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.443
0 = alien, 1 = Earth-identical
Insufficient insolation data — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Sun et al. 2019Instrument
Kepler CCD Array
Publication
2019-04
Observation locale
Space
Discovery cohort
Planets confirmed in 2018 at Kepler (6 shown).
Host System: Kepler-411
Spectral Class
K-type orange
Effective Temperature
4,974 K — cooler than the Sun (5,778 K)
Estimated Age
0.21 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.820 R☉
Stellar Mass
0.870 M☉
Metallicity [Fe/H]
0.21
Extended Stellar Properties
Surface gravity (log g)
4.600 dex
Stellar density
1.940 g/cm³
Systemic radial velocity
-20.69 km/s
Rotation period
10.40 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
6.478 mas
Total Proper Motion
35.294 mas/yr
PM Right Ascension
13.52 mas/yr
PM Declination
32.60 mas/yr
Galactic Cartesian (pc)
x = 0.196 · y = -0.619 · z = 0.761
Equatorial (J2000)
RA 287.60570° · Dec 49.52339°
Galactic ℓ, b
80.249° · 17.401°
Ecliptic λ, β
306.521° · 70.738°
HTM-20 index
719364788
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