Key parameters at a glance
- A radius of 2.65 Earth radii
- A mass of 7.51 Earth masses
- Surface gravity around 1.07 g
- An orbital period of 6.886 days
- Semi-major axis 0.0700 AU
- Equilibrium temperature 946 K (673 °C)
- Distance from Earth 3,431.94 light-years
- Earth Similarity Index 0.260
- Travel time at Voyager 1 speed 60,522,327 years
3 siblings around Kepler-299
Kepler-299 c 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 this | 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 | Super-Earth | 1.87 | 4.16 | 38.285 | 534 | 2014 |
Kepler-299 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#946of 1978
top 47.8%
This planet
2.65R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-299 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.65 | 11.21 |
| Mass (M⊕) | 1.00 | 7.51 | 317.83 |
| Density (g/cm³) | 5.51 | 2.22 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.07 | 2.53 |
| Insolation (S⊕) | 1.00 | 198.55 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 48304460
Gaia DR2
Gaia DR2 2131737340118958336
Gaia DR3
Gaia DR3 2131737340118958336
System
Kepler-299
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 6.89 Earth days (1.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0700 AU.
Transit Fingerprint
Depth
0.043 %
Duration
4.009 h
Impact parameter b
0.950
Rp / R★
0.019330
Transit midpoint (BJD)
2,454,971.4096
Photometric dip
Transit produces a flux drop of 429 ppm lasting ≈ 4.01 h.
Extended Orbital Architecture
Planet / star radius ratio
0.019330
Semi-major axis / stellar radius
4.860
Impact parameter (b)
0.950
Transit mid-time (BJD)
2,454,971.4096
Angular separation (arcsec)
0.06650
Eq. Temperature
946K
(673 °C)
Insolation (S⊕)
198.55
Earth = 1.00
Earth Similarity (ESI)
0.260
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
Kepler-109 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.65 R⊕ · 1,548.8 ly
Kepler-253 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.65 R⊕ · 2,735.1 ly
Kepler-603 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.65 R⊕ · 5,021.6 ly
Kepler-375 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.65 R⊕ · 4,040.5 ly
Kepler-1924 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.65 R⊕ · 6,232.1 ly
Kepler-1548 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.64 R⊕ · 2,845.0 ly