Key parameters at a glance
- A radius of 2.69 Earth radii
- A mass of 7.70 Earth masses
- Surface gravity around 1.06 g
- An orbital period of 15.943 days
- Semi-major axis 0.1194 AU
- Equilibrium temperature 616 K (343 °C)
- Distance from Earth 3,176.72 light-years
- Earth Similarity Index 0.398
- Travel time at Voyager 1 speed 56,021,517 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around Kepler-417
Kepler-417 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-417 b | Sub-Neptune | 2.31 | 11.00 | 12.331 | 671 | 2014 |
| Kepler-417 c this | Sub-Neptune | 2.69 | 7.70 | 15.943 | 616 | 2014 |
Kepler-417 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#881of 1978
top 44.5%
This planet
2.69R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-417 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.69 | 11.21 |
| Mass (M⊕) | 1.00 | 7.70 | 317.83 |
| Density (g/cm³) | 5.51 | 2.17 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.06 | 2.53 |
| Insolation (S⊕) | 1.00 | 30.97 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 270705374
Gaia DR2
Gaia DR2 2077774099706867712
Gaia DR3
Gaia DR3 2077774099706867712
System
Kepler-417
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 15.94 Earth days (4.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1194 AU.
Transit Fingerprint
Depth
0.109 %
Duration
3.493 h
Impact parameter b
0.440
Rp / R★
0.030672
Transit midpoint (BJD)
2,454,979.3300
Photometric dip
Transit produces a flux drop of 1,094 ppm lasting ≈ 3.49 h.
Extended Orbital Architecture
Planet / star radius ratio
0.030672
Semi-major axis / stellar radius
35.937
Impact parameter (b)
0.440
Transit mid-time (BJD)
2,454,979.3300
Angular separation (arcsec)
0.12300
Eq. Temperature
616K
(343 °C)
Insolation (S⊕)
30.97
Earth = 1.00
Earth Similarity (ESI)
0.398
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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
Hadden et al. 2014Instrument
Kepler CCD Array
Publication
2014-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
Host System: Kepler-417
Spectral Class
K-type orange
Effective Temperature
5,177 K — cooler than the Sun (5,778 K)
Estimated Age
4.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.806 R☉
Stellar Mass
0.900 M☉
Metallicity [Fe/H]
-0.20
Extended Stellar Properties
Surface gravity (log g)
4.570 dex
Stellar density
3.452 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.001 mas
Total Proper Motion
19.447 mas/yr
PM Right Ascension
-16.92 mas/yr
PM Declination
-9.59 mas/yr
Galactic Cartesian (pc)
x = 0.296 · y = -0.671 · z = 0.679
Equatorial (J2000)
RA 293.82418° · Dec 42.77965°
Galactic ℓ, b
75.769° · 10.687°
Ecliptic λ, β
310.599° · 62.900°
HTM-20 index
-979489728
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