Key parameters at a glance
- A radius of 3.60 Earth radii
- A mass of 12.60 Earth masses
- Surface gravity around 0.97 g
- An orbital period of 210.631 days
- Semi-major axis 0.6477 AU
- Equilibrium temperature 234 K (-39 °C)
- Distance from Earth 1,810.78 light-years
- Earth Similarity Index 0.569
- Travel time at Voyager 1 speed 31,933,143 years
1 sibling around Kepler-1143
Kepler-1143 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-1143 b | Super-Earth | 1.67 | 3.43 | 2.889 | 976 | 2016 |
| Kepler-1143 c this | Sub-Neptune | 3.60 | 12.60 | 210.631 | 234 | 2016 |
Kepler-1143 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#139of 1978
top 7.0%
This planet
3.60R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1143 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.60 | 11.21 |
| Mass (M⊕) | 1.00 | 12.60 | 317.83 |
| Density (g/cm³) | 5.51 | 1.48 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.97 | 2.53 |
| Insolation (S⊕) | 1.00 | 0.57 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 121215172
Gaia DR2
Gaia DR2 2100405381897402496
Gaia DR3
Gaia DR3 2100405381897402496
System
Kepler-1143
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 210.63 Earth days (57.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.6477 AU.
Transit Fingerprint
Depth
0.166 %
Duration
8.675 h
Impact parameter b
0.687
Rp / R★
0.043060
Transit midpoint (BJD)
2,455,133.7280
Photometric dip
Transit produces a flux drop of 1,658 ppm lasting ≈ 8.68 h.
Extended Orbital Architecture
Planet / star radius ratio
0.043060
Semi-major axis / stellar radius
156.100
Impact parameter (b)
0.687
Transit mid-time (BJD)
2,455,133.7280
Angular separation (arcsec)
1.17000
Eq. Temperature
234K
(-39 °C)
Insolation (S⊕)
0.57
Earth = 1.00
Earth Similarity (ESI)
0.569
0 = alien, 1 = Earth-identical
Within the conservative habitable zone — surface water would be frozen.
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-1143
Spectral Class
K-type orange
Effective Temperature
5,053 K — cooler than the Sun (5,778 K)
Estimated Age
4.79 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.770 R☉
Stellar Mass
0.810 M☉
Metallicity [Fe/H]
-0.06
Extended Stellar Properties
Surface gravity (log g)
4.580 dex
Stellar density
1.621 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
1.773 mas
Total Proper Motion
11.620 mas/yr
PM Right Ascension
-5.87 mas/yr
PM Declination
-10.03 mas/yr
Galactic Cartesian (pc)
x = 0.230 · y = -0.739 · z = 0.633
Equatorial (J2000)
RA 287.30277° · Dec 39.28964°
Galactic ℓ, b
70.377° · 13.614°
Ecliptic λ, β
298.377° · 61.035°
HTM-20 index
-550963945
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