Key parameters at a glance
- A radius of 1.86 Earth radii
- A mass of 4.12 Earth masses
- Surface gravity around 1.19 g
- An orbital period of 15.055 days
- Semi-major axis 0.1180 AU
- Equilibrium temperature 729 K (456 °C)
- Distance from Earth 3,431.94 light-years
- Earth Similarity Index 0.387
- Travel time at Voyager 1 speed 60,522,327 years
3 siblings around Kepler-299
Kepler-299 d shares its host star with 3 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-299 b | Super-Earth | 1.32 | 2.30 | 2.927 | 1,258 | 2014 |
| Kepler-299 c | Sub-Neptune | 2.65 | 7.51 | 6.886 | 946 | 2014 |
| Kepler-299 d this | Super-Earth | 1.86 | 4.12 | 15.055 | 729 | 2014 |
| Kepler-299 e | Super-Earth | 1.87 | 4.16 | 38.285 | 534 | 2014 |
Kepler-299 d Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#177of 1176
top 15.0%
This planet
1.86R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-299 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.86 | 11.21 |
| Mass (M⊕) | 1.00 | 4.12 | 317.83 |
| Density (g/cm³) | 5.51 | 3.52 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.19 | 2.53 |
| Insolation (S⊕) | 1.00 | 69.96 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 48304460
Gaia DR2
Gaia DR2 2131737340118958336
Gaia DR3
Gaia DR3 2131737340118958336
System
Kepler-299
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 15.05 Earth days (4.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1180 AU.
Transit Fingerprint
Depth
0.026 %
Duration
4.279 h
Impact parameter b
0.520
Rp / R★
0.014645
Transit midpoint (BJD)
2,454,977.5856
Photometric dip
Transit produces a flux drop of 256 ppm lasting ≈ 4.28 h.
Extended Orbital Architecture
Planet / star radius ratio
0.014645
Semi-major axis / stellar radius
16.530
Impact parameter (b)
0.520
Transit mid-time (BJD)
2,454,977.5856
Angular separation (arcsec)
0.11200
Eq. Temperature
729K
(456 °C)
Insolation (S⊕)
69.96
Earth = 1.00
Earth Similarity (ESI)
0.387
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-299
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,617 K — cooler than the Sun (5,778 K)
Estimated Age
3.24 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.032 R☉
Stellar Mass
1.004 M☉
Metallicity [Fe/H]
0.12
Extended Stellar Properties
Surface gravity (log g)
4.394 dex
Stellar density
1.090 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.922 mas
Total Proper Motion
9.940 mas/yr
PM Right Ascension
8.23 mas/yr
PM Declination
5.58 mas/yr
Galactic Cartesian (pc)
x = 0.151 · y = -0.644 · z = 0.750
Equatorial (J2000)
RA 283.20702° · Dec 48.58052°
Galactic ℓ, b
78.262° · 19.777°
Ecliptic λ, β
297.313° · 70.770°
HTM-20 index
1945540361
Similar Worlds
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Super-Earth · G-type yellow (Sun-like)
Radius 1.86 R⊕ · 1,938.9 ly
Kepler-1488 b
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Radius 1.86 R⊕ · 2,954.4 ly
Kepler-265 b
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K2-168 b
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Kepler-1463 b
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Kepler-1827 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.86 R⊕ · 2,238.9 ly