Key parameters at a glance
- A radius of 1.96 Earth radii
- A mass of 4.50 Earth masses
- Surface gravity around 1.17 g
- An orbital period of 10.475 days
- Semi-major axis 0.0800 AU
- Equilibrium temperature 540 K (267 °C)
- Distance from Earth 1,690.15 light-years
- Earth Similarity Index 0.506
- Travel time at Voyager 1 speed 29,805,854 years
- Almost certainly tidally locked to its host star given the close orbit
2 siblings around Kepler-298
Kepler-298 b shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-298 b this | Super-Earth | 1.96 | 4.50 | 10.475 | 540 | 2014 |
| Kepler-298 c | Super-Earth | 1.93 | 4.38 | 22.929 | 416 | 2014 |
| Kepler-298 d | Sub-Neptune | 2.50 | 6.80 | 77.474 | 277 | 2014 |
Kepler-298 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#49of 1176
top 4.1%
This planet
1.96R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-298 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.96 | 11.21 |
| Mass (M⊕) | 1.00 | 4.50 | 317.83 |
| Density (g/cm³) | 5.51 | 3.28 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.17 | 2.53 |
| Insolation (S⊕) | 1.00 | 24.71 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 48217868
Gaia DR2
Gaia DR2 2143758128946411904
Gaia DR3
Gaia DR3 2143758128946411904
System
Kepler-298
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 10.48 Earth days (2.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0800 AU.
Transit Fingerprint
Depth
0.107 %
Duration
2.320 h
Impact parameter b
0.420
Rp / R★
0.031102
Transit midpoint (BJD)
2,454,985.6416
Photometric dip
Transit produces a flux drop of 1,071 ppm lasting ≈ 2.32 h.
Extended Orbital Architecture
Planet / star radius ratio
0.031102
Semi-major axis / stellar radius
34.090
Impact parameter (b)
0.420
Transit mid-time (BJD)
2,454,985.6416
Angular separation (arcsec)
0.15400
Eq. Temperature
540K
(267 °C)
Insolation (S⊕)
24.71
Earth = 1.00
Earth Similarity (ESI)
0.506
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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-298
Spectral Class
K-type orange
Effective Temperature
4,465 K — cooler than the Sun (5,778 K)
Estimated Age
2.40 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.582 R☉
Stellar Mass
0.660 M☉
Metallicity [Fe/H]
-0.21
Extended Stellar Properties
Surface gravity (log g)
4.709 dex
Stellar density
6.832 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.901 mas
Total Proper Motion
10.336 mas/yr
PM Right Ascension
6.29 mas/yr
PM Declination
-8.20 mas/yr
Galactic Cartesian (pc)
x = 0.149 · y = -0.641 · z = 0.753
Equatorial (J2000)
RA 283.03984° · Dec 48.82533°
Galactic ℓ, b
78.470° · 19.961°
Ecliptic λ, β
297.195° · 71.036°
HTM-20 index
1908993741
Similar Worlds
Kepler-174 b
Super-Earth · K-type orange
Radius 1.96 R⊕ · 1,254.9 ly
Kepler-1460 b
Super-Earth · K-type orange
Radius 1.96 R⊕ · 1,804.4 ly
Kepler-737 b
Super-Earth · K-type orange
Radius 1.96 R⊕ · 669.0 ly
Kepler-1816 b
Super-Earth · K-type orange
Radius 1.97 R⊕ · 1,428.0 ly
WASP-84 c
Super-Earth · K-type orange
Radius 1.95 R⊕ · 328.1 ly
K2-285 e
Super-Earth · K-type orange
Radius 1.95 R⊕ · 505.4 ly