Key parameters at a glance
- A radius of 1.87 Earth radii
- A mass of 4.16 Earth masses
- Surface gravity around 1.19 g
- An orbital period of 38.285 days
- Semi-major axis 0.2200 AU
- Equilibrium temperature 534 K (261 °C)
- Distance from Earth 3,431.94 light-years
- Earth Similarity Index 0.520
- Travel time at Voyager 1 speed 60,522,327 years
3 siblings around Kepler-299
Kepler-299 e 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 | Super-Earth | 1.86 | 4.12 | 15.055 | 729 | 2014 |
| Kepler-299 e this | Super-Earth | 1.87 | 4.16 | 38.285 | 534 | 2014 |
Kepler-299 e Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#169of 1176
top 14.3%
This planet
1.87R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-299 e | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.87 | 11.21 |
| Mass (M⊕) | 1.00 | 4.16 | 317.83 |
| Density (g/cm³) | 5.51 | 3.50 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.19 | 2.53 |
| Insolation (S⊕) | 1.00 | 20.17 | 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 38.29 Earth days (10.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2200 AU.
Transit Fingerprint
Depth
0.032 %
Duration
5.638 h
Impact parameter b
0.220
Rp / R★
0.016260
Transit midpoint (BJD)
2,454,976.3075
Photometric dip
Transit produces a flux drop of 323 ppm lasting ≈ 5.64 h.
Extended Orbital Architecture
Planet / star radius ratio
0.016260
Semi-major axis / stellar radius
44.900
Impact parameter (b)
0.220
Transit mid-time (BJD)
2,454,976.3075
Angular separation (arcsec)
0.20900
Eq. Temperature
534K
(261 °C)
Insolation (S⊕)
20.17
Earth = 1.00
Earth Similarity (ESI)
0.520
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-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
Kepler-1638 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.87 R⊕ · 4,975.6 ly
Kepler-1683 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.87 R⊕ · 2,391.2 ly
55 Cnc e
Super-Earth · G-type yellow (Sun-like)
Radius 1.88 R⊕ · 41.0 ly
Kepler-191 c
Super-Earth · G-type yellow (Sun-like)
Radius 1.86 R⊕ · 1,938.9 ly
Kepler-299 d
Super-Earth · G-type yellow (Sun-like)
Radius 1.86 R⊕ · 3,431.9 ly
Kepler-1471 c
Super-Earth · G-type yellow (Sun-like)
Radius 1.88 R⊕ · 3,192.0 ly