Key parameters at a glance
- A radius of 2.50 Earth radii
- A mass of 6.80 Earth masses
- Surface gravity around 1.09 g
- An orbital period of 55.823 days
- Semi-major axis 0.2663 AU
- Equilibrium temperature 379 K (106 °C)
- Distance from Earth 2,454.87 light-years
- Earth Similarity Index 0.626
- Travel time at Voyager 1 speed 43,291,547 years
Kepler-1168 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1168of 1978
top 59.0%
This planet
2.50R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1168 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.50 | 11.21 |
| Mass (M⊕) | 1.00 | 6.80 | 317.83 |
| Density (g/cm³) | 5.51 | 2.39 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.09 | 2.53 |
| Insolation (S⊕) | 1.00 | 4.11 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 158412890
Gaia DR2
Gaia DR2 2131048324286015104
Gaia DR3
Gaia DR3 2131048324286015104
System
Kepler-1168
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 55.82 Earth days (15.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2663 AU.
Transit Fingerprint
Depth
0.088 %
Duration
5.493 h
Impact parameter b
0.160
Rp / R★
0.027515
Transit midpoint (BJD)
2,455,002.0364
Photometric dip
Transit produces a flux drop of 880 ppm lasting ≈ 5.49 h.
Extended Orbital Architecture
Planet / star radius ratio
0.027515
Semi-major axis / stellar radius
80.190
Impact parameter (b)
0.160
Transit mid-time (BJD)
2,455,002.0364
Angular separation (arcsec)
0.35400
Eq. Temperature
379K
(106 °C)
Insolation (S⊕)
4.11
Earth = 1.00
Earth Similarity (ESI)
0.626
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
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-1168
Spectral Class
K-type orange
Effective Temperature
5,157 K — cooler than the Sun (5,778 K)
Estimated Age
4.27 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.820 R☉
Stellar Mass
0.870 M☉
Metallicity [Fe/H]
0.13
Extended Stellar Properties
Surface gravity (log g)
4.560 dex
Stellar density
2.970 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.300 mas
Total Proper Motion
15.128 mas/yr
PM Right Ascension
10.83 mas/yr
PM Declination
10.56 mas/yr
Galactic Cartesian (pc)
x = 0.201 · y = -0.646 · z = 0.737
Equatorial (J2000)
RA 287.29778° · Dec 47.45549°
Galactic ℓ, b
78.162° · 16.821°
Ecliptic λ, β
303.891° · 68.868°
HTM-20 index
-1643433253
Similar Worlds
Kepler-1521 b
Sub-Neptune · K-type orange
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TOI-757 b
Sub-Neptune · K-type orange
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Kepler-391 b
Sub-Neptune · K-type orange
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Kepler-298 d
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Kepler-659 b
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Kepler-543 b
Sub-Neptune · K-type orange
Radius 2.50 R⊕ · 723.4 ly