Key parameters at a glance
- A radius of 3.01 Earth radii
- A mass of 9.32 Earth masses
- Surface gravity around 1.03 g
- An orbital period of 41.886 days
- Semi-major axis 0.2290 AU
- Equilibrium temperature 540 K (267 °C)
- Distance from Earth 2,268.90 light-years
- Earth Similarity Index 0.431
- Travel time at Voyager 1 speed 40,012,124 years
1 sibling around Kepler-180
Kepler-180 c 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-180 b | Super-Earth | 1.50 | 2.86 | 13.817 | 781 | 2014 |
| Kepler-180 c this | Sub-Neptune | 3.01 | 9.32 | 41.886 | 540 | 2014 |
Kepler-180 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#509of 1978
top 25.7%
This planet
3.01R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-180 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.01 | 11.21 |
| Mass (M⊕) | 1.00 | 9.32 | 317.83 |
| Density (g/cm³) | 5.51 | 1.88 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.03 | 2.53 |
| Insolation (S⊕) | 1.00 | 16.42 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 27532033
Gaia DR2
Gaia DR2 2134933208106983168
Gaia DR3
Gaia DR3 2134933208106983168
System
Kepler-180
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 41.89 Earth days (11.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2290 AU.
Transit Fingerprint
Depth
0.069 %
Duration
6.241 h
Impact parameter b
0.750
Rp / R★
0.023210
Transit midpoint (BJD)
2,455,011.6870
Photometric dip
Transit produces a flux drop of 687 ppm lasting ≈ 6.24 h.
Extended Orbital Architecture
Planet / star radius ratio
0.023210
Semi-major axis / stellar radius
53.200
Impact parameter (b)
0.750
Transit mid-time (BJD)
2,455,011.6870
Angular separation (arcsec)
0.32900
Eq. Temperature
540K
(267 °C)
Insolation (S⊕)
16.42
Earth = 1.00
Earth Similarity (ESI)
0.431
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-180
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,731 K — cooler than the Sun (5,778 K)
Estimated Age
9.70 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.063 R☉
Stellar Mass
0.950 M☉
Metallicity [Fe/H]
0.03
Extended Stellar Properties
Surface gravity (log g)
4.343 dex
Stellar density
1.663 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.409 mas
Total Proper Motion
13.732 mas/yr
PM Right Ascension
-7.55 mas/yr
PM Declination
-11.47 mas/yr
Galactic Cartesian (pc)
x = 0.279 · y = -0.583 · z = 0.764
Equatorial (J2000)
RA 295.57126° · Dec 49.77451°
Galactic ℓ, b
82.688° · 12.807°
Ecliptic λ, β
320.376° · 68.785°
HTM-20 index
-295042808
Similar Worlds
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Kepler-1036 b
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Kepler-414 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.01 R⊕ · 1,348.5 ly