Key parameters at a glance
- A radius of 2.79 Earth radii
- A mass of 8.20 Earth masses
- Surface gravity around 1.05 g
- An orbital period of 18.208 days
- Semi-major axis 0.1240 AU
- Equilibrium temperature 551 K (278 °C)
- Distance from Earth 1,438.64 light-years
- Earth Similarity Index 0.436
- Travel time at Voyager 1 speed 25,370,441 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around Kepler-152
Kepler-152 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-152 b this | Sub-Neptune | 2.79 | 8.20 | 18.208 | 551 | 2014 |
| Kepler-152 c | Sub-Neptune | 2.39 | 6.30 | 88.255 | 326 | 2014 |
Kepler-152 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#754of 1978
top 38.1%
This planet
2.79R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-152 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.79 | 11.21 |
| Mass (M⊕) | 1.00 | 8.20 | 317.83 |
| Density (g/cm³) | 5.51 | 2.07 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.05 | 2.53 |
| Insolation (S⊕) | 1.00 | 21.08 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 158387462
Gaia DR2
Gaia DR2 2105435544515167232
Gaia DR3
Gaia DR3 2105435544515167232
System
Kepler-152
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 18.21 Earth days (5.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1240 AU.
Transit Fingerprint
Depth
0.160 %
Duration
3.756 h
Impact parameter b
0.030
Rp / R★
0.037203
Transit midpoint (BJD)
2,455,018.8420
Photometric dip
Transit produces a flux drop of 1,597 ppm lasting ≈ 3.76 h.
Extended Orbital Architecture
Planet / star radius ratio
0.037203
Semi-major axis / stellar radius
34.300
Impact parameter (b)
0.030
Transit mid-time (BJD)
2,455,018.8420
Angular separation (arcsec)
0.28100
Eq. Temperature
551K
(278 °C)
Insolation (S⊕)
21.08
Earth = 1.00
Earth Similarity (ESI)
0.436
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-152
Spectral Class
K-type orange
Effective Temperature
5,088 K — cooler than the Sun (5,778 K)
Estimated Age
2.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.724 R☉
Stellar Mass
0.779 M☉
Metallicity [Fe/H]
-0.12
Extended Stellar Properties
Surface gravity (log g)
4.605 dex
Stellar density
1.860 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.238 mas
Total Proper Motion
30.775 mas/yr
PM Right Ascension
-12.42 mas/yr
PM Declination
-28.16 mas/yr
Galactic Cartesian (pc)
x = 0.216 · y = -0.711 · z = 0.669
Equatorial (J2000)
RA 286.86538° · Dec 41.98896°
Galactic ℓ, b
72.792° · 15.001°
Ecliptic λ, β
299.155° · 63.731°
HTM-20 index
-2069368069
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