Key parameters at a glance
- A radius of 1.17 Earth radii
- A mass of 1.71 Earth masses
- Surface gravity around 1.25 g
- An orbital period of 1.633 days
- Semi-major axis 0.0260 AU
- Equilibrium temperature 1,237 K (964 °C)
- Distance from Earth 1,522.28 light-years
- Earth Similarity Index 0.248
- Travel time at Voyager 1 speed 26,845,480 years
1 sibling around Kepler-185
Kepler-185 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-185 b this | Rocky Terrestrial | 1.17 | 1.71 | 1.633 | 1,237 | 2014 |
| Kepler-185 c | Sub-Neptune | 2.02 | 4.74 | 20.729 | 530 | 2014 |
Kepler-185 b Planet Profile
Physical Specs
Classification
Planet Type
Rocky Terrestrial
Discovery
Size rank in cohort
Rank by radius
#135of 570
top 23.5%
This planet
1.17R⊕
Rocky Terrestrial median
1.01R⊕
Nearest-size peers
| Metric | Earth | Kepler-185 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.17 | 11.21 |
| Mass (M⊕) | 1.00 | 1.71 | 317.83 |
| Density (g/cm³) | 5.51 | 5.87 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.25 | 2.53 |
| Insolation (S⊕) | 1.00 | 475.51 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 123490444
Gaia DR2
Gaia DR2 2105316247502568576
Gaia DR3
Gaia DR3 2105316247502568576
System
Kepler-185
Percentile among Rocky Terrestrial cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.63 Earth days (0.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0260 AU.
Transit Fingerprint
Depth
0.021 %
Duration
1.559 h
Impact parameter b
0.340
Rp / R★
0.013464
Transit midpoint (BJD)
2,454,967.5480
Photometric dip
Transit produces a flux drop of 209 ppm lasting ≈ 1.56 h.
Extended Orbital Architecture
Planet / star radius ratio
0.013464
Semi-major axis / stellar radius
8.050
Impact parameter (b)
0.340
Transit mid-time (BJD)
2,454,967.5480
Angular separation (arcsec)
0.05570
Eq. Temperature
1,237K
(964 °C)
Insolation (S⊕)
475.51
Earth = 1.00
Earth Similarity (ESI)
0.248
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
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-185
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,208 K — cooler than the Sun (5,778 K)
Estimated Age
11.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.806 R☉
Stellar Mass
0.763 M☉
Metallicity [Fe/H]
-0.14
Extended Stellar Properties
Surface gravity (log g)
4.545 dex
Stellar density
2.020 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.114 mas
Total Proper Motion
15.132 mas/yr
PM Right Ascension
11.17 mas/yr
PM Declination
10.21 mas/yr
Galactic Cartesian (pc)
x = 0.156 · y = -0.704 · z = 0.693
Equatorial (J2000)
RA 282.46817° · Dec 43.88995°
Galactic ℓ, b
73.398° · 18.693°
Ecliptic λ, β
292.812° · 66.344°
HTM-20 index
-676720491
Similar Worlds
Kepler-1035 b
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.17 R⊕ · 1,833.4 ly
Kepler-339 d
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.17 R⊕ · 2,011.2 ly
Kepler-295 c
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.17 R⊕ · 5,542.0 ly
Kepler-1955 b
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.17 R⊕ · 1,465.6 ly
Kepler-1933 b
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.18 R⊕ · 1,069.8 ly
Kepler-1390 b
Rocky Terrestrial · G-type yellow (Sun-like)
Radius 1.18 R⊕ · 2,359.5 ly