Key parameters at a glance
- A radius of 1.32 Earth radii
- A mass of 28.20 Earth masses
- Surface gravity around 16.18 g
- An orbital period of 12.551 days
- Semi-major axis 0.0870 AU
- Equilibrium temperature 480 K (207 °C)
- Distance from Earth 1,058.09 light-years
- Earth Similarity Index 0.330
- Travel time at Voyager 1 speed 18,659,460 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around Kepler-333
Kepler-333 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-333 b this | Super-Earth | 1.32 | 28.20 | 12.551 | 480 | 2014 |
| Kepler-333 c | Rocky Terrestrial | 1.11 | 1.41 | 24.088 | 386 | 2014 |
Kepler-333 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#1049of 1176
top 89.1%
This planet
1.32R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-333 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.32 | 11.21 |
| Mass (M⊕) | 1.00 | 28.20 | 317.83 |
| Density (g/cm³) | 5.51 | 67.40 | 1.33 |
| Surface Gravity (g) | 1.00 | 16.18 | 2.53 |
| Insolation (S⊕) | 1.00 | 16.82 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 28.200 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 137556197
Gaia DR2
Gaia DR2 2053581167404822272
Gaia DR3
Gaia DR3 2053581167404822272
System
Kepler-333
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 12.55 Earth days (3.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0870 AU.
Transit Fingerprint
Depth
0.055 %
Duration
3.216 h
Impact parameter b
0.760
Rp / R★
0.022970
Transit midpoint (BJD)
2,454,970.2614
Photometric dip
Transit produces a flux drop of 555 ppm lasting ≈ 3.22 h.
Extended Orbital Architecture
Planet / star radius ratio
0.022970
Semi-major axis / stellar radius
19.800
Impact parameter (b)
0.760
Transit mid-time (BJD)
2,454,970.2614
Angular separation (arcsec)
0.26800
Eq. Temperature
480K
(207 °C)
Insolation (S⊕)
16.82
Earth = 1.00
Earth Similarity (ESI)
0.330
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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-333
Spectral Class
K-type orange
Effective Temperature
4,259 K — cooler than the Sun (5,778 K)
Estimated Age
3.24 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.534 R☉
Stellar Mass
0.601 M☉
Metallicity [Fe/H]
0.05
Extended Stellar Properties
Surface gravity (log g)
4.732 dex
Stellar density
2.783 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
3.054 mas
Total Proper Motion
13.910 mas/yr
PM Right Ascension
7.20 mas/yr
PM Declination
-11.90 mas/yr
Galactic Cartesian (pc)
x = 0.287 · y = -0.699 · z = 0.655
Equatorial (J2000)
RA 292.28612° · Dec 40.91354°
Galactic ℓ, b
73.547° · 10.864°
Ecliptic λ, β
306.944° · 61.525°
HTM-20 index
1768355407
Similar Worlds
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Kepler-395 c
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Kepler-1783 b
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