Key parameters at a glance
- A radius of 2.26 Earth radii
- A mass of 5.73 Earth masses
- Surface gravity around 1.12 g
- An orbital period of 33.041 days
- Semi-major axis 0.1980 AU
- Equilibrium temperature 561 K (288 °C)
- Distance from Earth 2,985.02 light-years
- Earth Similarity Index 0.465
- Travel time at Voyager 1 speed 52,640,804 years
4 siblings around Kepler-154
Kepler-154 b shares its host star with 4 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-154 e | Super-Earth | 1.50 | 2.86 | 3.933 | 1,140 | 2016 |
| Kepler-154 f | Super-Earth | 1.50 | 2.86 | 9.919 | 838 | 2016 |
| Kepler-154 d | Sub-Neptune | 3.84 | 14.10 | 20.550 | 657 | 2016 |
| Kepler-154 b this | Sub-Neptune | 2.26 | 5.73 | 33.041 | 561 | 2014 |
| Kepler-154 c | Sub-Neptune | 2.95 | 9.01 | 62.303 | 454 | 2014 |
Kepler-154 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1572of 1978
top 79.4%
This planet
2.26R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-154 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.26 | 11.21 |
| Mass (M⊕) | 1.00 | 5.73 | 317.83 |
| Density (g/cm³) | 5.51 | 2.73 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.12 | 2.53 |
| Insolation (S⊕) | 1.00 | 28.11 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 416282268
Gaia DR2
Gaia DR2 2133022669212268800
Gaia DR3
Gaia DR3 2133022669212268800
System
Kepler-154
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 33.04 Earth days (9.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1980 AU.
Transit Fingerprint
Depth
0.058 %
Duration
3.355 h
Impact parameter b
0.370
Rp / R★
0.022276
Transit midpoint (BJD)
2,454,994.2209
Photometric dip
Transit produces a flux drop of 577 ppm lasting ≈ 3.36 h.
Extended Orbital Architecture
Planet / star radius ratio
0.022276
Semi-major axis / stellar radius
75.740
Impact parameter (b)
0.370
Transit mid-time (BJD)
2,454,994.2209
Angular separation (arcsec)
0.21600
Eq. Temperature
561K
(288 °C)
Insolation (S⊕)
28.11
Earth = 1.00
Earth Similarity (ESI)
0.465
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-154
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,690 K — cooler than the Sun (5,778 K)
Estimated Age
8.91 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.001 R☉
Stellar Mass
0.933 M☉
Metallicity [Fe/H]
0.02
Extended Stellar Properties
Surface gravity (log g)
4.415 dex
Stellar density
0.820 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.064 mas
Total Proper Motion
5.422 mas/yr
PM Right Ascension
-2.66 mas/yr
PM Declination
4.73 mas/yr
Galactic Cartesian (pc)
x = 0.218 · y = -0.606 · z = 0.765
Equatorial (J2000)
RA 289.78054° · Dec 49.89656°
Galactic ℓ, b
81.168° · 16.242°
Ecliptic λ, β
310.871° · 70.542°
HTM-20 index
953134717
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HD 28471 c
Sub-Neptune · G-type yellow (Sun-like)
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Kepler-163 c
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K2-159 b
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Kepler-1863 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.26 R⊕ · 2,823.0 ly