Key parameters at a glance
- A radius of 4.06 Earth radii
- A mass of 15.50 Earth masses
- Surface gravity around 0.94 g
- An orbital period of 30.184 days
- Semi-major axis 0.1930 AU
- Equilibrium temperature 634 K (361 °C)
- Distance from Earth 4,574.60 light-years
- Earth Similarity Index 0.326
- Travel time at Voyager 1 speed 80,673,046 years
1 sibling around Kepler-302
Kepler-302 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-302 b this | Neptune-like | 4.06 | 15.50 | 30.184 | 634 | 2014 |
| Kepler-302 c | Gas Giant | 12.45 | — | 127.282 | 392 | 2014 |
Kepler-302 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#554of 574
top 96.3%
This planet
4.06R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | Kepler-302 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 4.06 | 11.21 |
| Mass (M⊕) | 1.00 | 15.50 | 317.83 |
| Density (g/cm³) | 5.51 | 1.27 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.94 | 2.53 |
| Insolation (S⊕) | 1.00 | 31.25 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 270951852
Gaia DR2
Gaia DR2 2078195212660287616
Gaia DR3
Gaia DR3 2078195212660287616
System
Kepler-302
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 30.18 Earth days (8.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1930 AU.
Transit Fingerprint
Depth
0.097 %
Duration
5.940 h
Impact parameter b
0.730
Rp / R★
0.029821
Transit midpoint (BJD)
2,454,979.6401
Photometric dip
Transit produces a flux drop of 975 ppm lasting ≈ 5.94 h.
Extended Orbital Architecture
Planet / star radius ratio
0.029821
Semi-major axis / stellar radius
40.330
Impact parameter (b)
0.730
Transit mid-time (BJD)
2,454,979.6401
Angular separation (arcsec)
0.13800
Eq. Temperature
634K
(361 °C)
Insolation (S⊕)
31.25
Earth = 1.00
Earth Similarity (ESI)
0.326
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-302
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,740 K — cooler than the Sun (5,778 K)
Estimated Age
4.47 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.220 R☉
Stellar Mass
1.021 M☉
Metallicity [Fe/H]
0.16
Extended Stellar Properties
Surface gravity (log g)
4.286 dex
Stellar density
1.070 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.685 mas
Total Proper Motion
17.566 mas/yr
PM Right Ascension
-6.25 mas/yr
PM Declination
-16.42 mas/yr
Galactic Cartesian (pc)
x = 0.298 · y = -0.660 · z = 0.690
Equatorial (J2000)
RA 294.31693° · Dec 43.62924°
Galactic ℓ, b
76.705° · 10.758°
Ecliptic λ, β
312.023° · 63.563°
HTM-20 index
-1340158003
Similar Worlds
Kepler-1771 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.06 R⊕ · 1,845.2 ly
HD 125612 c
Neptune-like · G-type yellow (Sun-like)
Radius 4.07 R⊕ · 187.9 ly
Kepler-82 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.07 R⊕ · 2,949.5 ly
Kepler-473 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.08 R⊕ · 2,954.8 ly
K2-7 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.04 R⊕ · 2,408.8 ly
Kepler-1732 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.10 R⊕ · 4,205.5 ly