Key parameters at a glance
- A radius of 1.75 Earth radii
- A mass of 3.71 Earth masses
- Surface gravity around 1.21 g
- An orbital period of 27.321 days
- Semi-major axis 0.1830 AU
- Equilibrium temperature 705 K (432 °C)
- Distance from Earth 4,236.38 light-years
- Earth Similarity Index 0.408
- Travel time at Voyager 1 speed 74,708,470 years
2 siblings around Kepler-347
Kepler-347 c shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-347 b | Super-Earth | 1.97 | 4.54 | 12.798 | 908 | 2014 |
| Kepler-347 c this | Super-Earth | 1.75 | 3.71 | 27.321 | 705 | 2014 |
| Kepler-347 d | Sub-Neptune | 3.04 | 9.48 | 85.517 | 482 | 2023 |
Kepler-347 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#326of 1176
top 27.6%
This planet
1.75R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-347 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.75 | 11.21 |
| Mass (M⊕) | 1.00 | 3.71 | 317.83 |
| Density (g/cm³) | 5.51 | 3.80 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.21 | 2.53 |
| Insolation (S⊕) | 1.00 | 65.71 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 299158566
Gaia DR2
Gaia DR2 2132614922197436928
Gaia DR3
Gaia DR3 2132614922197436928
System
Kepler-347
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 27.32 Earth days (7.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1830 AU.
Transit Fingerprint
Depth
0.028 %
Duration
3.927 h
Impact parameter b
0.770
Rp / R★
0.015074
Transit midpoint (BJD)
2,454,987.3062
Photometric dip
Transit produces a flux drop of 280 ppm lasting ≈ 3.93 h.
Extended Orbital Architecture
Planet / star radius ratio
0.015074
Semi-major axis / stellar radius
12.220
Impact parameter (b)
0.770
Transit mid-time (BJD)
2,454,987.3062
Angular separation (arcsec)
0.14100
Eq. Temperature
705K
(432 °C)
Insolation (S⊕)
65.71
Earth = 1.00
Earth Similarity (ESI)
0.408
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-347
Spectral Class
F-type yellow-white
Effective Temperature
6,088 K — hotter than the Sun (5,778 K)
Estimated Age
11.75 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.005 R☉
Stellar Mass
0.922 M☉
Metallicity [Fe/H]
-0.14
Extended Stellar Properties
Surface gravity (log g)
4.472 dex
Stellar density
0.320 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.741 mas
Total Proper Motion
16.464 mas/yr
PM Right Ascension
-1.61 mas/yr
PM Declination
-16.39 mas/yr
Galactic Cartesian (pc)
x = 0.214 · y = -0.616 · z = 0.758
Equatorial (J2000)
RA 289.19960° · Dec 49.30564°
Galactic ℓ, b
80.449° · 16.358°
Ecliptic λ, β
309.149° · 70.147°
HTM-20 index
430245161
Similar Worlds
Kepler-1100 b
Super-Earth · F-type yellow-white
Radius 1.75 R⊕ · 2,262.3 ly
Kepler-1279 b
Super-Earth · F-type yellow-white
Radius 1.75 R⊕ · 4,873.5 ly
Kepler-403 c
Super-Earth · F-type yellow-white
Radius 1.75 R⊕ · 2,740.6 ly
Kepler-1375 b
Super-Earth · F-type yellow-white
Radius 1.74 R⊕ · 4,666.8 ly
Kepler-918 b
Super-Earth · F-type yellow-white
Radius 1.74 R⊕ · 3,343.2 ly
Kepler-270 c
Super-Earth · F-type yellow-white
Radius 1.77 R⊕ · 3,094.5 ly