Key parameters at a glance
- A radius of 1.69 Earth radii
- A mass of 3.50 Earth masses
- Surface gravity around 1.23 g
- An orbital period of 1.104 days
- Semi-major axis 0.0188 AU
- Equilibrium temperature 1,397 K (1124 °C)
- Distance from Earth 2,040.73 light-years
- Earth Similarity Index 0.198
- Travel time at Voyager 1 speed 35,988,307 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1148 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#415of 1176
top 35.2%
This planet
1.69R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-1148 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.69 | 11.21 |
| Mass (M⊕) | 1.00 | 3.50 | 317.83 |
| Density (g/cm³) | 5.51 | 3.98 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.23 | 2.53 |
| Insolation (S⊕) | 1.00 | 815.41 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 159581434
Gaia DR2
Gaia DR2 2127431274629643008
Gaia DR3
Gaia DR3 2127431274629643008
System
Kepler-1148
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.10 Earth days (0.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0188 AU.
Transit Fingerprint
Depth
0.049 %
Duration
1.055 h
Impact parameter b
0.096
Rp / R★
0.019976
Transit midpoint (BJD)
2,454,965.3208
Photometric dip
Transit produces a flux drop of 494 ppm lasting ≈ 1.05 h.
Extended Orbital Architecture
Planet / star radius ratio
0.019976
Semi-major axis / stellar radius
8.146
Impact parameter (b)
0.096
Transit mid-time (BJD)
2,454,965.3208
Angular separation (arcsec)
0.03000
Eq. Temperature
1,397K
(1124 °C)
Insolation (S⊕)
815.41
Earth = 1.00
Earth Similarity (ESI)
0.198
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Morton et al. 2016Instrument
Kepler CCD Array
Publication
2016-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at Kepler (12 shown).
Host System: Kepler-1148
Spectral Class
K-type orange
Effective Temperature
5,054 K — cooler than the Sun (5,778 K)
Estimated Age
4.57 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.770 R☉
Stellar Mass
0.810 M☉
Metallicity [Fe/H]
-0.02
Extended Stellar Properties
Surface gravity (log g)
4.580 dex
Stellar density
8.382 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.570 mas
Total Proper Motion
6.586 mas/yr
PM Right Ascension
5.89 mas/yr
PM Declination
2.94 mas/yr
Galactic Cartesian (pc)
x = 0.250 · y = -0.652 · z = 0.716
Equatorial (J2000)
RA 290.95361° · Dec 45.71955°
Galactic ℓ, b
77.547° · 13.825°
Ecliptic λ, β
308.538° · 66.377°
HTM-20 index
1452647489
Similar Worlds
K2-131 b
Super-Earth · K-type orange
Radius 1.69 R⊕ · 497.4 ly
Kepler-674 b
Super-Earth · K-type orange
Radius 1.69 R⊕ · 1,116.3 ly
Kepler-968 c
Super-Earth · K-type orange
Radius 1.69 R⊕ · 946.9 ly
K2-381 d
Super-Earth · K-type orange
Radius 1.69 R⊕ · 475.2 ly
K2-394 b
Super-Earth · K-type orange
Radius 1.69 R⊕ · 319.7 ly
K2-377 b
Super-Earth · K-type orange
Radius 1.69 R⊕ · 636.5 ly