Key parameters at a glance
- A radius of 2.25 Earth radii
- A mass of 5.69 Earth masses
- Surface gravity around 1.12 g
- An orbital period of 40.715 days
- Semi-major axis 0.2320 AU
- Equilibrium temperature 516 K (243 °C)
- Distance from Earth 3,582.66 light-years
- Earth Similarity Index 0.502
- Travel time at Voyager 1 speed 63,180,216 years
1 sibling around Kepler-300
Kepler-300 c 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-300 b | Super-Earth | 1.67 | 3.43 | 10.446 | 812 | 2014 |
| Kepler-300 c this | Sub-Neptune | 2.25 | 5.69 | 40.715 | 516 | 2014 |
Kepler-300 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1589of 1978
top 80.3%
This planet
2.25R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-300 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.25 | 11.21 |
| Mass (M⊕) | 1.00 | 5.69 | 317.83 |
| Density (g/cm³) | 5.51 | 2.74 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.12 | 2.53 |
| Insolation (S⊕) | 1.00 | 43.25 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 27458633
Gaia DR2
Gaia DR2 2134730897967299968
Gaia DR3
Gaia DR3 2134730897967299968
System
Kepler-300
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 40.71 Earth days (11.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2320 AU.
Transit Fingerprint
Depth
0.056 %
Duration
8.692 h
Impact parameter b
0.700
Rp / R★
0.022280
Transit midpoint (BJD)
2,454,979.5644
Photometric dip
Transit produces a flux drop of 564 ppm lasting ≈ 8.69 h.
Extended Orbital Architecture
Planet / star radius ratio
0.022280
Semi-major axis / stellar radius
32.300
Impact parameter (b)
0.700
Transit mid-time (BJD)
2,454,979.5644
Angular separation (arcsec)
0.21100
Eq. Temperature
516K
(243 °C)
Insolation (S⊕)
43.25
Earth = 1.00
Earth Similarity (ESI)
0.502
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Transit timing variations
Gravitational interactions from neighbours have been detected.
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-300
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,986 K — hotter than the Sun (5,778 K)
Estimated Age
3.63 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.900 R☉
Stellar Mass
1.070 M☉
Metallicity [Fe/H]
0.04
Extended Stellar Properties
Surface gravity (log g)
4.532 dex
Stellar density
0.400 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.882 mas
Total Proper Motion
2.557 mas/yr
PM Right Ascension
1.96 mas/yr
PM Declination
-1.64 mas/yr
Galactic Cartesian (pc)
x = 0.283 · y = -0.598 · z = 0.750
Equatorial (J2000)
RA 295.28869° · Dec 48.59972°
Galactic ℓ, b
81.530° · 12.437°
Ecliptic λ, β
318.463° · 67.828°
HTM-20 index
1861404682
Similar Worlds
Kepler-1090 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.25 R⊕ · 2,800.9 ly
Kepler-467 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.25 R⊕ · 1,520.8 ly
Kepler-1381 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.25 R⊕ · 3,904.2 ly
Kepler-272 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.25 R⊕ · 2,901.5 ly
Kepler-172 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.25 R⊕ · 2,702.5 ly
K2-355 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.25 R⊕ · 1,632.4 ly