Key parameters at a glance
- A radius of 1.99 Earth radii
- A mass of 4.62 Earth masses
- Surface gravity around 1.17 g
- An orbital period of 20.026 days
- Semi-major axis 0.1420 AU
- Equilibrium temperature 559 K (286 °C)
- Distance from Earth 2,263.07 light-years
- Earth Similarity Index 0.488
- Travel time at Voyager 1 speed 39,909,167 years
1 sibling around Kepler-243
Kepler-243 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-243 b | Sub-Neptune | 2.45 | 6.57 | 5.715 | 850 | 2014 |
| Kepler-243 c this | Super-Earth | 1.99 | 4.62 | 20.026 | 559 | 2014 |
Kepler-243 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#4of 1176
top 0.3%
This planet
1.99R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-243 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.99 | 11.21 |
| Mass (M⊕) | 1.00 | 4.62 | 317.83 |
| Density (g/cm³) | 5.51 | 3.22 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.17 | 2.53 |
| Insolation (S⊕) | 1.00 | 21.72 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 164886497
Gaia DR2
Gaia DR2 2104090257679181696
Gaia DR3
Gaia DR3 2104090257679181696
System
Kepler-243
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 20.03 Earth days (5.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1420 AU.
Transit Fingerprint
Depth
0.042 %
Duration
1.319 h
Impact parameter b
0.770
Rp / R★
0.019580
Transit midpoint (BJD)
2,454,979.9077
Photometric dip
Transit produces a flux drop of 421 ppm lasting ≈ 1.32 h.
Extended Orbital Architecture
Planet / star radius ratio
0.019580
Semi-major axis / stellar radius
40.700
Impact parameter (b)
0.770
Transit mid-time (BJD)
2,454,979.9077
Angular separation (arcsec)
0.20500
Eq. Temperature
559K
(286 °C)
Insolation (S⊕)
21.72
Earth = 1.00
Earth Similarity (ESI)
0.488
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-243
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,228 K — cooler than the Sun (5,778 K)
Estimated Age
1.86 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.842 R☉
Stellar Mass
0.904 M☉
Metallicity [Fe/H]
0.26
Extended Stellar Properties
Surface gravity (log g)
4.565 dex
Stellar density
1.630 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.413 mas
Total Proper Motion
4.791 mas/yr
PM Right Ascension
-2.99 mas/yr
PM Declination
3.74 mas/yr
Galactic Cartesian (pc)
x = 0.194 · y = -0.717 · z = 0.670
Equatorial (J2000)
RA 285.11048° · Dec 42.03396°
Galactic ℓ, b
72.313° · 16.221°
Ecliptic λ, β
296.308° · 64.099°
HTM-20 index
2105763682
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