Key parameters at a glance
- A radius of 2.65 Earth radii
- A mass of 37.10 Earth masses
- Surface gravity around 5.28 g
- An orbital period of 22.951 days
- Semi-major axis 0.1731 AU
- Equilibrium temperature 873 K (600 °C)
- Distance from Earth 1,848.82 light-years
- Earth Similarity Index 0.258
- Travel time at Voyager 1 speed 32,603,856 years
1 sibling around Kepler-145
Kepler-145 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-145 b this | Sub-Neptune | 2.65 | 37.10 | 22.951 | 873 | 2013 |
| Kepler-145 c | Neptune-like | 4.32 | 79.40 | 42.882 | 709 | 2013 |
Kepler-145 b 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-145 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.65 | 11.21 |
| Mass (M⊕) | 1.00 | 37.10 | 317.83 |
| Density (g/cm³) | 5.51 | 13.00 | 1.33 |
| Surface Gravity (g) | 1.00 | 5.28 | 2.53 |
| Insolation (S⊕) | 1.00 | 154.71 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 37.100 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 159721091
Gaia DR2
Gaia DR2 2126237131982289280
Gaia DR3
Gaia DR3 2126237131982289280
System
Kepler-145
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 22.95 Earth days (6.3% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.1731 AU.
Transit Fingerprint
Depth
0.013 %
Duration
4.481 h
Impact parameter b
0.923
Rp / R★
0.010880
Transit midpoint (BJD)
2,454,984.5418
Photometric dip
Transit produces a flux drop of 130 ppm lasting ≈ 4.48 h.
Extended Orbital Architecture
Planet / star radius ratio
0.010880
Semi-major axis / stellar radius
15.270
Impact parameter (b)
0.923
Transit mid-time (BJD)
2,454,984.5418
Angular separation (arcsec)
0.30500
Eq. Temperature
873K
(600 °C)
Insolation (S⊕)
154.71
Earth = 1.00
Earth Similarity (ESI)
0.258
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Transit timing variations
Gravitational interactions from neighbours have been detected.
Discovery Paper
Discovery cohort
Planets confirmed in 2013 at Kepler (12 shown).
Host System: Kepler-145
Spectral Class
F-type yellow-white
Effective Temperature
6,022 K — hotter than the Sun (5,778 K)
Estimated Age
3.24 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.850 R☉
Stellar Mass
1.320 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.020 dex
Stellar density
0.200 g/cm³
Systemic radial velocity
-26.09 km/s
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.736 mas
Total Proper Motion
12.157 mas/yr
PM Right Ascension
-2.76 mas/yr
PM Declination
-11.84 mas/yr
Galactic Cartesian (pc)
x = 0.260 · y = -0.664 · z = 0.701
Equatorial (J2000)
RA 291.38774° · Dec 44.52905°
Galactic ℓ, b
76.573° · 13.043°
Ecliptic λ, β
308.221° · 65.155°
HTM-20 index
561090173
Similar Worlds
Kepler-1941 b
Sub-Neptune · F-type yellow-white
Radius 2.65 R⊕ · 4,874.0 ly
Kepler-616 d
Sub-Neptune · F-type yellow-white
Radius 2.65 R⊕ · 3,084.7 ly
Kepler-1931 b
Sub-Neptune · F-type yellow-white
Radius 2.65 R⊕ · 2,022.5 ly
Kepler-346 b
Sub-Neptune · F-type yellow-white
Radius 2.66 R⊕ · 3,209.7 ly
Kepler-127 c
Sub-Neptune · F-type yellow-white
Radius 2.66 R⊕ · 1,150.7 ly
Kepler-127 d
Sub-Neptune · F-type yellow-white
Radius 2.64 R⊕ · 1,150.7 ly