Key parameters at a glance
- A radius of 2.45 Earth radii
- A mass of 6.57 Earth masses
- Surface gravity around 1.09 g
- An orbital period of 5.715 days
- Semi-major axis 0.0620 AU
- Equilibrium temperature 850 K (577 °C)
- Distance from Earth 2,263.07 light-years
- Earth Similarity Index 0.299
- Travel time at Voyager 1 speed 39,909,167 years
1 sibling around Kepler-243
Kepler-243 b 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 this | Sub-Neptune | 2.45 | 6.57 | 5.715 | 850 | 2014 |
| Kepler-243 c | Super-Earth | 1.99 | 4.62 | 20.026 | 559 | 2014 |
Kepler-243 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1260of 1978
top 63.7%
This planet
2.45R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-243 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.45 | 11.21 |
| Mass (M⊕) | 1.00 | 6.57 | 317.83 |
| Density (g/cm³) | 5.51 | 2.45 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.09 | 2.53 |
| Insolation (S⊕) | 1.00 | 115.51 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 164886497
Gaia DR2
Gaia DR2 2104090257679181696
Gaia DR3
Gaia DR3 2104090257679181696
System
Kepler-243
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.72 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0620 AU.
Transit Fingerprint
Depth
0.091 %
Duration
2.484 h
Impact parameter b
0.170
Rp / R★
0.026450
Transit midpoint (BJD)
2,455,007.8783
Photometric dip
Transit produces a flux drop of 908 ppm lasting ≈ 2.48 h.
Extended Orbital Architecture
Planet / star radius ratio
0.026450
Semi-major axis / stellar radius
17.776
Impact parameter (b)
0.170
Transit mid-time (BJD)
2,455,007.8783
Angular separation (arcsec)
0.08940
Eq. Temperature
850K
(577 °C)
Insolation (S⊕)
115.51
Earth = 1.00
Earth Similarity (ESI)
0.299
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
Similar Worlds
Kepler-164 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.45 R⊕ · 2,905.3 ly
Kepler-1176 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.45 R⊕ · 2,820.3 ly
Kepler-570 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.45 R⊕ · 1,853.0 ly
K2-293 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.45 R⊕ · 1,279.4 ly
Kepler-751 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.46 R⊕ · 2,480.2 ly
Kepler-1491 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.44 R⊕ · 6,737.0 ly