Key parameters at a glance
- A radius of 3.84 Earth radii
- A mass of 14.10 Earth masses
- Surface gravity around 0.96 g
- An orbital period of 20.550 days
- Semi-major axis 0.1435 AU
- Equilibrium temperature 657 K (384 °C)
- Distance from Earth 2,985.02 light-years
- Earth Similarity Index 0.323
- Travel time at Voyager 1 speed 52,640,804 years
4 siblings around Kepler-154
Kepler-154 d 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 this | Sub-Neptune | 3.84 | 14.10 | 20.550 | 657 | 2016 |
| Kepler-154 b | 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 d Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#47of 1978
top 2.3%
This planet
3.84R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-154 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.84 | 11.21 |
| Mass (M⊕) | 1.00 | 14.10 | 317.83 |
| Density (g/cm³) | 5.51 | 1.37 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.96 | 2.53 |
| Insolation (S⊕) | 1.00 | 53.00 | 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 20.55 Earth days (5.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1435 AU.
Transit Fingerprint
Depth
0.156 %
Duration
5.459 h
Impact parameter b
0.470
Rp / R★
0.036181
Transit midpoint (BJD)
2,455,011.9461
Photometric dip
Transit produces a flux drop of 1,564 ppm lasting ≈ 5.46 h.
Extended Orbital Architecture
Planet / star radius ratio
0.036181
Semi-major axis / stellar radius
29.250
Impact parameter (b)
0.470
Transit mid-time (BJD)
2,455,011.9461
Angular separation (arcsec)
0.15700
Eq. Temperature
657K
(384 °C)
Insolation (S⊕)
53.00
Earth = 1.00
Earth Similarity (ESI)
0.323
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
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-154
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,769 K — cooler than the Sun (5,778 K)
Estimated Age
4.47 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.980 R☉
Stellar Mass
0.980 M☉
Metallicity [Fe/H]
-0.04
Extended Stellar Properties
Surface gravity (log g)
4.450 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
Similar Worlds
Kepler-1811 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.85 R⊕ · 4,535.4 ly
Kepler-232 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.83 R⊕ · 4,400.3 ly
HD 31527 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.85 R⊕ · 125.4 ly
TOI-1422 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.83 R⊕ · 506.0 ly
Kepler-293 c
Sub-Neptune · G-type yellow (Sun-like)
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HIP 9618 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.83 R⊕ · 220.3 ly