Key parameters at a glance
- A radius of 2.50 Earth radii
- A mass of 6.80 Earth masses
- Surface gravity around 1.09 g
- An orbital period of 13.900 days
- Semi-major axis 0.1023 AU
- Equilibrium temperature 521 K (248 °C)
- Distance from Earth 723.42 light-years
- Earth Similarity Index 0.478
- Travel time at Voyager 1 speed 12,757,520 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-543 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1168of 1978
top 59.0%
This planet
2.50R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-543 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.50 | 11.21 |
| Mass (M⊕) | 1.00 | 6.80 | 317.83 |
| Density (g/cm³) | 5.51 | 2.39 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.09 | 2.53 |
| Insolation (S⊕) | 1.00 | 23.08 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 121123361
Gaia DR2
Gaia DR2 2099620777272914944
Gaia DR3
Gaia DR3 2099620777272914944
System
Kepler-543
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 13.90 Earth days (3.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1023 AU.
Transit Fingerprint
Depth
0.115 %
Duration
3.563 h
Impact parameter b
0.728
Rp / R★
0.033509
Transit midpoint (BJD)
2,455,015.8653
Photometric dip
Transit produces a flux drop of 1,146 ppm lasting ≈ 3.56 h.
Extended Orbital Architecture
Planet / star radius ratio
0.033509
Semi-major axis / stellar radius
22.800
Impact parameter (b)
0.728
Transit mid-time (BJD)
2,455,015.8653
Angular separation (arcsec)
0.46100
Eq. Temperature
521K
(248 °C)
Insolation (S⊕)
23.08
Earth = 1.00
Earth Similarity (ESI)
0.478
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.
Discovery Paper
Primary reference
Morton et al. 2016Instrument
Kepler CCD Array
Publication
2016-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at Kepler (12 shown).
Host System: Kepler-543
Spectral Class
K-type orange
Effective Temperature
4,671 K — cooler than the Sun (5,778 K)
Estimated Age
5.75 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.670 R☉
Stellar Mass
0.700 M☉
Metallicity [Fe/H]
-0.19
Extended Stellar Properties
Surface gravity (log g)
4.630 dex
Stellar density
2.230 g/cm³
Systemic radial velocity
-22.49 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
4.480 mas
Total Proper Motion
6.248 mas/yr
PM Right Ascension
1.13 mas/yr
PM Declination
6.15 mas/yr
Galactic Cartesian (pc)
x = 0.230 · y = -0.744 · z = 0.627
Equatorial (J2000)
RA 287.21873° · Dec 38.86254°
Galactic ℓ, b
69.949° · 13.499°
Ecliptic λ, β
298.035° · 60.637°
HTM-20 index
-695177236
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Kepler-298 d
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