Key parameters at a glance
- A radius of 2.41 Earth radii
- A mass of 6.39 Earth masses
- Surface gravity around 1.10 g
- An orbital period of 9.990 days
- Semi-major axis 0.0880 AU
- Equilibrium temperature 705 K (432 °C)
- Distance from Earth 3,426.11 light-years
- Earth Similarity Index 0.365
- Travel time at Voyager 1 speed 60,419,371 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1170 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1312of 1978
top 66.3%
This planet
2.41R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1170 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.41 | 11.21 |
| Mass (M⊕) | 1.00 | 6.39 | 317.83 |
| Density (g/cm³) | 5.51 | 2.51 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.10 | 2.53 |
| Insolation (S⊕) | 1.00 | 69.54 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 63125460
Gaia DR2
Gaia DR2 2125965007156694528
Gaia DR3
Gaia DR3 2125965007156694528
System
Kepler-1170
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 9.99 Earth days (2.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0880 AU.
Transit Fingerprint
Depth
0.099 %
Duration
3.704 h
Impact parameter b
0.044
Rp / R★
0.029305
Transit midpoint (BJD)
2,454,966.7615
Photometric dip
Transit produces a flux drop of 988 ppm lasting ≈ 3.70 h.
Extended Orbital Architecture
Planet / star radius ratio
0.029305
Semi-major axis / stellar radius
21.210
Impact parameter (b)
0.044
Transit mid-time (BJD)
2,454,966.7615
Angular separation (arcsec)
0.08380
Eq. Temperature
705K
(432 °C)
Insolation (S⊕)
69.54
Earth = 1.00
Earth Similarity (ESI)
0.365
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.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Transit timing variations
Gravitational interactions from neighbours have been detected.
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-1170
Spectral Class
K-type orange
Effective Temperature
5,069 K — cooler than the Sun (5,778 K)
Estimated Age
4.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.760 R☉
Stellar Mass
0.800 M☉
Metallicity [Fe/H]
-0.09
Extended Stellar Properties
Surface gravity (log g)
4.580 dex
Stellar density
1.805 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.924 mas
Total Proper Motion
16.279 mas/yr
PM Right Ascension
-5.05 mas/yr
PM Declination
-15.48 mas/yr
Galactic Cartesian (pc)
x = 0.272 · y = -0.669 · z = 0.692
Equatorial (J2000)
RA 292.16854° · Dec 43.77960°
Galactic ℓ, b
76.130° · 12.213°
Ecliptic λ, β
308.846° · 64.258°
HTM-20 index
-563893653
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