Key parameters at a glance
- A radius of 2.43 Earth radii
- A mass of 6.48 Earth masses
- Surface gravity around 1.10 g
- An orbital period of 8.472 days
- Semi-major axis 0.0770 AU
- Equilibrium temperature 751 K (478 °C)
- Distance from Earth 2,793.26 light-years
- Earth Similarity Index 0.341
- Travel time at Voyager 1 speed 49,259,057 years
1 sibling around Kepler-233
Kepler-233 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-233 b this | Sub-Neptune | 2.43 | 6.48 | 8.472 | 751 | 2014 |
| Kepler-233 c | Sub-Neptune | 2.71 | 7.80 | 60.419 | 390 | 2014 |
Kepler-233 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1281of 1978
top 64.7%
This planet
2.43R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-233 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.43 | 11.21 |
| Mass (M⊕) | 1.00 | 6.48 | 317.83 |
| Density (g/cm³) | 5.51 | 2.48 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.10 | 2.53 |
| Insolation (S⊕) | 1.00 | 85.13 | 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 8.47 Earth days (2.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0770 AU.
Transit Fingerprint
Depth
0.112 %
Duration
2.697 h
Impact parameter b
0.080
Rp / R★
0.030119
Transit midpoint (BJD)
2,455,007.1621
Photometric dip
Transit produces a flux drop of 1,124 ppm lasting ≈ 2.70 h.
Extended Orbital Architecture
Planet / star radius ratio
0.030119
Semi-major axis / stellar radius
24.420
Impact parameter (b)
0.080
Transit mid-time (BJD)
2,455,007.1621
Angular separation (arcsec)
0.08990
Eq. Temperature
751K
(478 °C)
Insolation (S⊕)
85.13
Earth = 1.00
Earth Similarity (ESI)
0.341
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-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-307 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.43 R⊕ · 1,877.3 ly
Kepler-616 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.43 R⊕ · 3,084.7 ly
Kepler-765 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.43 R⊕ · 3,510.4 ly
Kepler-1739 b
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Radius 2.43 R⊕ · 2,556.0 ly
HD 6061 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.43 R⊕ · 220.5 ly
K2-44 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.43 R⊕ · 1,554.8 ly