Key parameters at a glance
- A radius of 2.67 Earth radii
- A mass of 7.61 Earth masses
- Surface gravity around 1.07 g
- An orbital period of 16.568 days
- Semi-major axis 0.1200 AU
- Equilibrium temperature 548 K (275 °C)
- Distance from Earth 2,461.65 light-years
- Earth Similarity Index 0.446
- Travel time at Voyager 1 speed 43,411,242 years
1 sibling around Kepler-263
Kepler-263 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-263 b this | Sub-Neptune | 2.67 | 7.61 | 16.568 | 548 | 2014 |
| Kepler-263 c | Sub-Neptune | 2.47 | 6.66 | 47.333 | 386 | 2014 |
Kepler-263 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#904of 1978
top 45.7%
This planet
2.67R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-263 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.67 | 11.21 |
| Mass (M⊕) | 1.00 | 7.61 | 317.83 |
| Density (g/cm³) | 5.51 | 2.20 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.07 | 2.53 |
| Insolation (S⊕) | 1.00 | 24.31 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 137637249
Gaia DR2
Gaia DR2 2051832634677771008
Gaia DR3
Gaia DR3 2051832634677771008
System
Kepler-263
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 16.57 Earth days (4.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1200 AU.
Transit Fingerprint
Depth
0.132 %
Duration
4.143 h
Impact parameter b
0.080
Rp / R★
0.032932
Transit midpoint (BJD)
2,454,979.1515
Photometric dip
Transit produces a flux drop of 1,322 ppm lasting ≈ 4.14 h.
Extended Orbital Architecture
Planet / star radius ratio
0.032932
Semi-major axis / stellar radius
30.260
Impact parameter (b)
0.080
Transit mid-time (BJD)
2,454,979.1515
Angular separation (arcsec)
0.15900
Eq. Temperature
548K
(275 °C)
Insolation (S⊕)
24.31
Earth = 1.00
Earth Similarity (ESI)
0.446
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-263
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,265 K — cooler than the Sun (5,778 K)
Estimated Age
2.24 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.785 R☉
Stellar Mass
0.793 M☉
Metallicity [Fe/H]
-0.03
Extended Stellar Properties
Surface gravity (log g)
4.576 dex
Stellar density
2.000 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
1.297 mas
Total Proper Motion
5.791 mas/yr
PM Right Ascension
5.77 mas/yr
PM Declination
0.45 mas/yr
Galactic Cartesian (pc)
x = 0.303 · y = -0.732 · z = 0.610
Equatorial (J2000)
RA 292.46980° · Dec 37.56779°
Galactic ℓ, b
70.584° · 9.221°
Ecliptic λ, β
305.193° · 58.293°
HTM-20 index
1236448017
Similar Worlds
Kepler-1978 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.67 R⊕ · 2,822.9 ly
Kepler-1044 b
Sub-Neptune · G-type yellow (Sun-like)
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K2-75 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.67 R⊕ · 1,832.8 ly
HD 155918 b
Sub-Neptune · G-type yellow (Sun-like)
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Kepler-1453 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.67 R⊕ · 3,901.0 ly
Kepler-292 e
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.67 R⊕ · 3,445.8 ly