Key parameters at a glance
- A radius of 1.97 Earth radii
- A mass of 4.54 Earth masses
- Surface gravity around 1.17 g
- An orbital period of 12.798 days
- Semi-major axis 0.1100 AU
- Equilibrium temperature 908 K (635 °C)
- Distance from Earth 4,236.38 light-years
- Earth Similarity Index 0.303
- Travel time at Voyager 1 speed 74,708,470 years
2 siblings around Kepler-347
Kepler-347 b 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 this | Super-Earth | 1.97 | 4.54 | 12.798 | 908 | 2014 |
| Kepler-347 c | 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 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#38of 1176
top 3.1%
This planet
1.97R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-347 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.97 | 11.21 |
| Mass (M⊕) | 1.00 | 4.54 | 317.83 |
| Density (g/cm³) | 5.51 | 3.26 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.17 | 2.53 |
| Insolation (S⊕) | 1.00 | 180.55 | 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 12.80 Earth days (3.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1100 AU.
Transit Fingerprint
Depth
0.034 %
Duration
6.244 h
Impact parameter b
0.710
Rp / R★
0.016170
Transit midpoint (BJD)
2,454,966.6482
Photometric dip
Transit produces a flux drop of 337 ppm lasting ≈ 6.24 h.
Extended Orbital Architecture
Planet / star radius ratio
0.016170
Semi-major axis / stellar radius
16.300
Impact parameter (b)
0.710
Transit mid-time (BJD)
2,454,966.6482
Angular separation (arcsec)
0.08470
Eq. Temperature
908K
(635 °C)
Insolation (S⊕)
180.55
Earth = 1.00
Earth Similarity (ESI)
0.303
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-1831 b
Super-Earth · F-type yellow-white
Radius 1.97 R⊕ · 3,436.0 ly
HR 858 c
Super-Earth · F-type yellow-white
Radius 1.98 R⊕ · 104.3 ly
Kepler-1857 b
Super-Earth · F-type yellow-white
Radius 1.96 R⊕ · 2,783.0 ly
Kepler-1093 c
Super-Earth · F-type yellow-white
Radius 1.96 R⊕ · 3,499.3 ly
Kepler-996 b
Super-Earth · F-type yellow-white
Radius 1.98 R⊕ · 3,967.9 ly
Kepler-1061 b
Super-Earth · F-type yellow-white
Radius 1.98 R⊕ · 1,772.3 ly