Key parameters at a glance
- A radius of 2.44 Earth radii
- A mass of 6.53 Earth masses
- Surface gravity around 1.10 g
- An orbital period of 18.784 days
- Semi-major axis 0.1198 AU
- Equilibrium temperature 433 K (160 °C)
- Distance from Earth 1,520.16 light-years
- Earth Similarity Index 0.567
- Travel time at Voyager 1 speed 26,808,037 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around Kepler-1086
Kepler-1086 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-1086 b this | Sub-Neptune | 2.44 | 6.53 | 18.784 | 433 | 2016 |
| Kepler-1086 c | Sub-Neptune | 2.94 | 8.96 | 161.516 | 211 | 2016 |
Kepler-1086 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1269of 1978
top 64.1%
This planet
2.44R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1086 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.44 | 11.21 |
| Mass (M⊕) | 1.00 | 6.53 | 317.83 |
| Density (g/cm³) | 5.51 | 2.47 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.10 | 2.53 |
| Insolation (S⊕) | 1.00 | 9.16 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 271545939
Gaia DR2
Gaia DR2 2080018374737161984
Gaia DR3
Gaia DR3 2080018374737161984
System
Kepler-1086
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 18.78 Earth days (5.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1198 AU.
Transit Fingerprint
Depth
0.115 %
Duration
3.234 h
Impact parameter b
0.658
Rp / R★
0.034021
Transit midpoint (BJD)
2,454,970.8832
Photometric dip
Transit produces a flux drop of 1,153 ppm lasting ≈ 3.23 h.
Extended Orbital Architecture
Planet / star radius ratio
0.034021
Semi-major axis / stellar radius
36.600
Impact parameter (b)
0.658
Transit mid-time (BJD)
2,454,970.8832
Angular separation (arcsec)
0.25700
Eq. Temperature
433K
(160 °C)
Insolation (S⊕)
9.16
Earth = 1.00
Earth Similarity (ESI)
0.567
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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-1086
Spectral Class
K-type orange
Effective Temperature
4,350 K — cooler than the Sun (5,778 K)
Estimated Age
2.88 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.660 R☉
Stellar Mass
0.700 M☉
Metallicity [Fe/H]
0.06
Extended Stellar Properties
Surface gravity (log g)
4.650 dex
Stellar density
5.074 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.117 mas
Total Proper Motion
5.000 mas/yr
PM Right Ascension
3.61 mas/yr
PM Declination
-3.46 mas/yr
Galactic Cartesian (pc)
x = 0.297 · y = -0.630 · z = 0.717
Equatorial (J2000)
RA 295.25119° · Dec 45.84295°
Galactic ℓ, b
79.017° · 11.192°
Ecliptic λ, β
315.431° · 65.348°
HTM-20 index
-1996805465
Similar Worlds
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Sub-Neptune · K-type orange
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TOI-1798.01
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