Key parameters at a glance
- A radius of 1.48 Earth radii
- A mass of 2.79 Earth masses
- Surface gravity around 1.27 g
- An orbital period of 26.695 days
- Semi-major axis 0.1810 AU
- Equilibrium temperature 706 K (433 °C)
- Distance from Earth 3,332.21 light-years
- Earth Similarity Index 0.430
- Travel time at Voyager 1 speed 58,763,439 years
1 sibling around Kepler-123
Kepler-123 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-123 b | Sub-Neptune | 2.94 | 55.30 | 17.232 | 817 | 2014 |
| Kepler-123 c this | Super-Earth | 1.48 | 2.79 | 26.695 | 706 | 2014 |
Kepler-123 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#784of 1176
top 66.6%
This planet
1.48R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-123 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.48 | 11.21 |
| Mass (M⊕) | 1.00 | 2.79 | 317.83 |
| Density (g/cm³) | 5.51 | 4.73 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.27 | 2.53 |
| Insolation (S⊕) | 1.00 | 77.40 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 272944990
Gaia DR2
Gaia DR2 2078697552035948800
Gaia DR3
Gaia DR3 2078697552035948800
System
Kepler-123
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 26.70 Earth days (7.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1810 AU.
Transit Fingerprint
Depth
0.013 %
Duration
4.529 h
Impact parameter b
0.230
Rp / R★
0.010567
Transit midpoint (BJD)
2,454,976.9981
Photometric dip
Transit produces a flux drop of 133 ppm lasting ≈ 4.53 h.
Extended Orbital Architecture
Planet / star radius ratio
0.010567
Semi-major axis / stellar radius
44.630
Impact parameter (b)
0.230
Transit mid-time (BJD)
2,454,976.9981
Angular separation (arcsec)
0.17700
Eq. Temperature
706K
(433 °C)
Insolation (S⊕)
77.40
Earth = 1.00
Earth Similarity (ESI)
0.430
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-123
Spectral Class
F-type yellow-white
Effective Temperature
6,089 K — hotter than the Sun (5,778 K)
Estimated Age
5.01 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.264 R☉
Stellar Mass
1.079 M☉
Metallicity [Fe/H]
-0.08
Extended Stellar Properties
Surface gravity (log g)
4.277 dex
Stellar density
0.490 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.950 mas
Total Proper Motion
1.170 mas/yr
PM Right Ascension
-0.35 mas/yr
PM Declination
1.12 mas/yr
Galactic Cartesian (pc)
x = 0.333 · y = -0.654 · z = 0.679
Equatorial (J2000)
RA 296.99859° · Dec 42.78196°
Galactic ℓ, b
76.888° · 8.635°
Ecliptic λ, β
315.287° · 62.042°
HTM-20 index
1601151001
Similar Worlds
Kepler-208 e
Super-Earth · F-type yellow-white
Radius 1.48 R⊕ · 2,528.8 ly
Kepler-1275 b
Super-Earth · F-type yellow-white
Radius 1.48 R⊕ · 3,763.8 ly
Kepler-1271 b
Super-Earth · F-type yellow-white
Radius 1.48 R⊕ · 2,713.6 ly
Kepler-1050 c
Super-Earth · F-type yellow-white
Radius 1.48 R⊕ · 1,599.8 ly
Kepler-1622 b
Super-Earth · F-type yellow-white
Radius 1.47 R⊕ · 2,597.8 ly
Kepler-909 b
Super-Earth · F-type yellow-white
Radius 1.47 R⊕ · 1,009.8 ly