Key parameters at a glance
- A radius of 1.55 Earth radii
- A mass of 3.02 Earth masses
- Surface gravity around 1.26 g
- An orbital period of 5.715 days
- Semi-major axis 0.0630 AU
- Equilibrium temperature 971 K (698 °C)
- Distance from Earth 3,432.89 light-years
- Earth Similarity Index 0.305
- Travel time at Voyager 1 speed 60,539,007 years
2 siblings around Kepler-255
Kepler-255 b shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-255 d | Super-Earth | 1.32 | 2.30 | 1.046 | 1,710 | 2016 |
| Kepler-255 b this | Super-Earth | 1.55 | 3.02 | 5.715 | 971 | 2014 |
| Kepler-255 c | Sub-Neptune | 2.99 | 9.22 | 9.946 | 807 | 2014 |
Kepler-255 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#652of 1176
top 55.4%
This planet
1.55R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-255 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.55 | 11.21 |
| Mass (M⊕) | 1.00 | 3.02 | 317.83 |
| Density (g/cm³) | 5.51 | 4.46 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.26 | 2.53 |
| Insolation (S⊕) | 1.00 | 174.40 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 272083669
Gaia DR2
Gaia DR2 2080202611655694336
Gaia DR3
Gaia DR3 2080202611655694336
System
Kepler-255
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.71 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0630 AU.
Transit Fingerprint
Depth
0.030 %
Duration
2.238 h
Impact parameter b
0.010
Rp / R★
0.016046
Transit midpoint (BJD)
2,454,965.6404
Photometric dip
Transit produces a flux drop of 298 ppm lasting ≈ 2.24 h.
Extended Orbital Architecture
Planet / star radius ratio
0.016046
Semi-major axis / stellar radius
9.300
Impact parameter (b)
0.010
Transit mid-time (BJD)
2,454,965.6404
Angular separation (arcsec)
0.05990
Eq. Temperature
971K
(698 °C)
Insolation (S⊕)
174.40
Earth = 1.00
Earth Similarity (ESI)
0.305
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-255
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,573 K — cooler than the Sun (5,778 K)
Estimated Age
2.40 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.933 R☉
Stellar Mass
0.867 M☉
Metallicity [Fe/H]
0.34
Extended Stellar Properties
Surface gravity (log g)
4.516 dex
Stellar density
1.500 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.922 mas
Total Proper Motion
16.357 mas/yr
PM Right Ascension
2.10 mas/yr
PM Declination
-16.22 mas/yr
Galactic Cartesian (pc)
x = 0.305 · y = -0.624 · z = 0.719
Equatorial (J2000)
RA 296.06427° · Dec 45.97676°
Galactic ℓ, b
79.407° · 10.754°
Ecliptic λ, β
316.796° · 65.237°
HTM-20 index
-1995035172
Similar Worlds
Kepler-226 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.55 R⊕ · 3,196.8 ly
Kepler-1466 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.55 R⊕ · 2,061.1 ly
Kepler-1295 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.55 R⊕ · 3,830.6 ly
Kepler-784 c
Super-Earth · G-type yellow (Sun-like)
Radius 1.55 R⊕ · 4,252.2 ly
Kepler-195 c
Super-Earth · G-type yellow (Sun-like)
Radius 1.55 R⊕ · 2,126.7 ly
Kepler-1282 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.55 R⊕ · 3,598.4 ly