Key parameters at a glance
- A radius of 3.37 Earth radii
- A mass of 11.30 Earth masses
- Surface gravity around 0.99 g
- An orbital period of 22.825 days
- Semi-major axis 0.1780 AU
- Equilibrium temperature 946 K (673 °C)
- Distance from Earth 2,637.83 light-years
- Earth Similarity Index 0.235
- Travel time at Voyager 1 speed 46,518,055 years
1 sibling around Kepler-340
Kepler-340 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-340 b | Sub-Neptune | 2.53 | 6.94 | 14.844 | 1,092 | 2014 |
| Kepler-340 c this | Sub-Neptune | 3.37 | 11.30 | 22.825 | 946 | 2014 |
Kepler-340 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#237of 1978
top 11.9%
This planet
3.37R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-340 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.37 | 11.21 |
| Mass (M⊕) | 1.00 | 11.30 | 317.83 |
| Density (g/cm³) | 5.51 | 1.62 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.99 | 2.53 |
| Insolation (S⊕) | 1.00 | 154.65 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 184247532
Gaia DR2
Gaia DR2 2076383625510685824
Gaia DR3
Gaia DR3 2076383625510685824
System
Kepler-340
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 22.82 Earth days (6.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1780 AU.
Transit Fingerprint
Depth
0.032 %
Duration
6.614 h
Impact parameter b
0.120
Rp / R★
0.016406
Transit midpoint (BJD)
2,454,977.4662
Photometric dip
Transit produces a flux drop of 323 ppm lasting ≈ 6.61 h.
Extended Orbital Architecture
Planet / star radius ratio
0.016406
Semi-major axis / stellar radius
27.250
Impact parameter (b)
0.120
Transit mid-time (BJD)
2,454,977.4662
Angular separation (arcsec)
0.22000
Eq. Temperature
946K
(673 °C)
Insolation (S⊕)
154.65
Earth = 1.00
Earth Similarity (ESI)
0.235
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-340
Spectral Class
F-type yellow-white
Effective Temperature
6,620 K — hotter than the Sun (5,778 K)
Estimated Age
1.29 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.850 R☉
Stellar Mass
1.650 M☉
Metallicity [Fe/H]
0.06
Extended Stellar Properties
Surface gravity (log g)
4.063 dex
Stellar density
0.621 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.209 mas
Total Proper Motion
1.252 mas/yr
PM Right Ascension
0.06 mas/yr
PM Declination
-1.25 mas/yr
Galactic Cartesian (pc)
x = 0.334 · y = -0.686 · z = 0.647
Equatorial (J2000)
RA 295.93347° · Dec 40.30055°
Galactic ℓ, b
74.304° · 8.128°
Ecliptic λ, β
311.876° · 60.025°
HTM-20 index
-1522982276
Similar Worlds
Kepler-1165 c
Sub-Neptune · F-type yellow-white
Radius 3.36 R⊕ · 5,137.6 ly
Kepler-268 c
Sub-Neptune · F-type yellow-white
Radius 3.38 R⊕ · 2,778.4 ly
Kepler-1510 b
Sub-Neptune · F-type yellow-white
Radius 3.36 R⊕ · 5,532.4 ly
Kepler-541 b
Sub-Neptune · F-type yellow-white
Radius 3.36 R⊕ · 3,459.5 ly
Kepler-275 c
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Kepler-1360 b
Sub-Neptune · F-type yellow-white
Radius 3.40 R⊕ · 4,945.4 ly