Key parameters at a glance
- A radius of 2.49 Earth radii
- A mass of 6.76 Earth masses
- Surface gravity around 1.09 g
- An orbital period of 29.022 days
- Semi-major axis 0.1790 AU
- Equilibrium temperature 559 K (286 °C)
- Distance from Earth 1,990.61 light-years
- Earth Similarity Index 0.450
- Travel time at Voyager 1 speed 35,104,491 years
2 siblings around Kepler-184
Kepler-184 d 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-184 b | Sub-Neptune | 2.36 | 6.17 | 10.688 | 780 | 2014 |
| Kepler-184 c | Super-Earth | 1.97 | 8.80 | 20.303 | 630 | 2014 |
| Kepler-184 d this | Sub-Neptune | 2.49 | 6.76 | 29.022 | 559 | 2014 |
Kepler-184 d Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1191of 1978
top 60.2%
This planet
2.49R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-184 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.49 | 11.21 |
| Mass (M⊕) | 1.00 | 6.76 | 317.83 |
| Density (g/cm³) | 5.51 | 2.41 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.09 | 2.53 |
| Insolation (S⊕) | 1.00 | 18.56 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 63119782
Gaia DR2
Gaia DR2 2125831210335846016
Gaia DR3
Gaia DR3 2125831210335846016
System
Kepler-184
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 29.02 Earth days (7.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1790 AU.
Transit Fingerprint
Depth
0.064 %
Duration
3.961 h
Impact parameter b
0.890
Rp / R★
0.028130
Transit midpoint (BJD)
2,455,031.3679
Photometric dip
Transit produces a flux drop of 638 ppm lasting ≈ 3.96 h.
Extended Orbital Architecture
Planet / star radius ratio
0.028130
Semi-major axis / stellar radius
22.700
Impact parameter (b)
0.890
Transit mid-time (BJD)
2,455,031.3679
Angular separation (arcsec)
0.29300
Eq. Temperature
559K
(286 °C)
Insolation (S⊕)
18.56
Earth = 1.00
Earth Similarity (ESI)
0.450
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-184
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,788 K — hotter than the Sun (5,778 K)
Estimated Age
2.95 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.873 R☉
Stellar Mass
0.872 M☉
Metallicity [Fe/H]
-0.20
Extended Stellar Properties
Surface gravity (log g)
4.510 dex
Stellar density
1.590 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.610 mas
Total Proper Motion
22.875 mas/yr
PM Right Ascension
-2.93 mas/yr
PM Declination
-22.69 mas/yr
Galactic Cartesian (pc)
x = 0.273 · y = -0.678 · z = 0.683
Equatorial (J2000)
RA 291.95188° · Dec 43.07462°
Galactic ℓ, b
75.411° · 12.045°
Ecliptic λ, β
307.962° · 63.649°
HTM-20 index
-731533176
Similar Worlds
HD 88986 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.49 R⊕ · 108.5 ly
Kepler-109 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.49 R⊕ · 1,548.8 ly
Kepler-265 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.49 R⊕ · 4,175.6 ly
Kepler-11 f
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.49 R⊕ · 2,108.1 ly
Kepler-289 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.49 R⊕ · 2,297.6 ly
Kepler-865 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.49 R⊕ · 1,911.7 ly