Key parameters at a glance
- A radius of 3.60 Earth radii
- A mass of 12.60 Earth masses
- Surface gravity around 0.97 g
- An orbital period of 4.180 days
- Semi-major axis 0.0500 AU
- Equilibrium temperature 957 K (684 °C)
- Distance from Earth 2,580.43 light-years
- Earth Similarity Index 0.226
- Travel time at Voyager 1 speed 45,505,803 years
2 siblings around Kepler-148
Kepler-148 c 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-148 b | Super-Earth | 1.80 | 3.89 | 1.729 | 1,284 | 2014 |
| Kepler-148 c this | Sub-Neptune | 3.60 | 12.60 | 4.180 | 957 | 2014 |
| Kepler-148 d | Neptune-like | 8.68 | 56.30 | 51.847 | 413 | 2016 |
Kepler-148 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#139of 1978
top 7.0%
This planet
3.60R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-148 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.60 | 11.21 |
| Mass (M⊕) | 1.00 | 12.60 | 317.83 |
| Density (g/cm³) | 5.51 | 1.48 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.97 | 2.53 |
| Insolation (S⊕) | 1.00 | 187.20 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 159171904
Gaia DR2
Gaia DR2 2127828988601389440
Gaia DR3
Gaia DR3 2127828988601389440
System
Kepler-148
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.18 Earth days (1.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0500 AU.
Transit Fingerprint
Depth
0.188 %
Duration
2.482 h
Impact parameter b
0.480
Rp / R★
0.036930
Transit midpoint (BJD)
2,455,006.7193
Photometric dip
Transit produces a flux drop of 1,881 ppm lasting ≈ 2.48 h.
Extended Orbital Architecture
Planet / star radius ratio
0.036930
Semi-major axis / stellar radius
13.534
Impact parameter (b)
0.480
Transit mid-time (BJD)
2,455,006.7193
Angular separation (arcsec)
0.06320
Eq. Temperature
957K
(684 °C)
Insolation (S⊕)
187.20
Earth = 1.00
Earth Similarity (ESI)
0.226
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-148
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,272 K — cooler than the Sun (5,778 K)
Estimated Age
11.20 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.851 R☉
Stellar Mass
0.860 M☉
Metallicity [Fe/H]
0.14
Extended Stellar Properties
Surface gravity (log g)
4.546 dex
Stellar density
2.532 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.235 mas
Total Proper Motion
2.893 mas/yr
PM Right Ascension
-2.87 mas/yr
PM Declination
0.33 mas/yr
Galactic Cartesian (pc)
x = 0.231 · y = -0.643 · z = 0.730
Equatorial (J2000)
RA 289.78616° · Dec 46.85882°
Galactic ℓ, b
78.276° · 15.030°
Ecliptic λ, β
307.641° · 67.729°
HTM-20 index
1774126763
Similar Worlds
Kepler-119 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.60 R⊕ · 2,289.6 ly
Kepler-1780 b
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K2-225 b
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Kepler-559 b
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HD 96700 d
Sub-Neptune · G-type yellow (Sun-like)
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Kepler-869 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.61 R⊕ · 3,064.1 ly