Key parameters at a glance
- A radius of 2.71 Earth radii
- A mass of 7.80 Earth masses
- Surface gravity around 1.06 g
- An orbital period of 60.419 days
- Semi-major axis 0.2870 AU
- Equilibrium temperature 390 K (117 °C)
- Distance from Earth 2,793.26 light-years
- Earth Similarity Index 0.593
- Travel time at Voyager 1 speed 49,259,057 years
1 sibling around Kepler-233
Kepler-233 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-233 b | Sub-Neptune | 2.43 | 6.48 | 8.472 | 751 | 2014 |
| Kepler-233 c this | Sub-Neptune | 2.71 | 7.80 | 60.419 | 390 | 2014 |
Kepler-233 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#849of 1978
top 42.9%
This planet
2.71R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-233 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.71 | 11.21 |
| Mass (M⊕) | 1.00 | 7.80 | 317.83 |
| Density (g/cm³) | 5.51 | 2.15 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.06 | 2.53 |
| Insolation (S⊕) | 1.00 | 6.20 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 27843776
Gaia DR2
Gaia DR2 2135507084456876928
Gaia DR3
Gaia DR3 2135507084456876928
System
Kepler-233
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 60.42 Earth days (16.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2870 AU.
Transit Fingerprint
Depth
0.093 %
Duration
5.619 h
Impact parameter b
0.860
Rp / R★
0.027422
Transit midpoint (BJD)
2,455,014.1615
Photometric dip
Transit produces a flux drop of 931 ppm lasting ≈ 5.62 h.
Extended Orbital Architecture
Planet / star radius ratio
0.027422
Semi-major axis / stellar radius
93.710
Impact parameter (b)
0.860
Transit mid-time (BJD)
2,455,014.1615
Angular separation (arcsec)
0.33500
Eq. Temperature
390K
(117 °C)
Insolation (S⊕)
6.20
Earth = 1.00
Earth Similarity (ESI)
0.593
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Transit timing variations
Gravitational interactions from neighbours have been detected.
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-233
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,360 K — cooler than the Sun (5,778 K)
Estimated Age
0.60 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.758 R☉
Stellar Mass
0.855 M☉
Metallicity [Fe/H]
-0.09
Extended Stellar Properties
Surface gravity (log g)
4.614 dex
Stellar density
3.863 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.139 mas
Total Proper Motion
11.587 mas/yr
PM Right Ascension
3.98 mas/yr
PM Declination
-10.88 mas/yr
Galactic Cartesian (pc)
x = 0.278 · y = -0.560 · z = 0.781
Equatorial (J2000)
RA 296.36651° · Dec 51.31945°
Galactic ℓ, b
84.335° · 13.064°
Ecliptic λ, β
323.784° · 69.879°
HTM-20 index
-231446373
Similar Worlds
Kepler-1230 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.71 R⊕ · 4,449.5 ly
Kepler-478 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.71 R⊕ · 1,369.9 ly
Kepler-540 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.71 R⊕ · 1,273.2 ly
Kepler-294 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.71 R⊕ · 4,426.0 ly
Kepler-1801 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.71 R⊕ · 2,737.5 ly
Kepler-1843 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.71 R⊕ · 2,559.1 ly