Key parameters at a glance
- A radius of 2.61 Earth radii
- A mass of 7.31 Earth masses
- Surface gravity around 1.07 g
- An orbital period of 16.737 days
- Semi-major axis 0.1390 AU
- Equilibrium temperature 464 K (191 °C)
- Distance from Earth 1,081.35 light-years
- Earth Similarity Index 0.521
- Travel time at Voyager 1 speed 19,069,675 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-970 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1011of 1978
top 51.1%
This planet
2.61R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-970 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.61 | 11.21 |
| Mass (M⊕) | 1.00 | 7.31 | 317.83 |
| Density (g/cm³) | 5.51 | 2.26 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.07 | 2.53 |
| Insolation (S⊕) | 1.00 | 11.11 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 122069243
Gaia DR2
Gaia DR2 2101379205604338688
Gaia DR3
Gaia DR3 2101379205604338688
System
Kepler-970
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 16.74 Earth days (4.6% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.1390 AU.
Transit Fingerprint
Depth
0.129 %
Duration
2.200 h
Impact parameter b
0.700
Rp / R★
0.033700
Transit midpoint (BJD)
2,454,976.1326
Photometric dip
Transit produces a flux drop of 1,289 ppm lasting ≈ 2.20 h.
Extended Orbital Architecture
Planet / star radius ratio
0.033700
Semi-major axis / stellar radius
42.200
Impact parameter (b)
0.700
Transit mid-time (BJD)
2,454,976.1326
Long. of periastron (ω)
117.00°
Angular separation (arcsec)
0.41900
Eq. Temperature
464K
(191 °C)
Insolation (S⊕)
11.11
Earth = 1.00
Earth Similarity (ESI)
0.521
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-970
Spectral Class
K-type orange
Effective Temperature
4,290 K — cooler than the Sun (5,778 K)
Estimated Age
0.10 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.710 R☉
Stellar Mass
0.670 M☉
Metallicity [Fe/H]
0.04
Extended Stellar Properties
Surface gravity (log g)
4.618 dex
Stellar density
2.650 g/cm³
Systemic radial velocity
-27.15 km/s
Rotational v·sin i
5.20 km/s
Rotation period
9.23 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.987 mas
Total Proper Motion
3.246 mas/yr
PM Right Ascension
-2.75 mas/yr
PM Declination
1.73 mas/yr
Galactic Cartesian (pc)
x = 0.255 · y = -0.714 · z = 0.652
Equatorial (J2000)
RA 289.62522° · Dec 40.70874°
Galactic ℓ, b
72.462° · 12.587°
Ecliptic λ, β
302.757° · 61.934°
HTM-20 index
-1390855294
Similar Worlds
Kepler-257 b
Sub-Neptune · K-type orange
Radius 2.61 R⊕ · 2,544.9 ly
GJ 143 b
Sub-Neptune · K-type orange
Radius 2.61 R⊕ · 53.2 ly
Kepler-242 b
Sub-Neptune · K-type orange
Radius 2.61 R⊕ · 1,957.7 ly
HD 110067 g
Sub-Neptune · K-type orange
Radius 2.61 R⊕ · 104.9 ly
K2-54 b
Sub-Neptune · K-type orange
Radius 2.61 R⊕ · 570.6 ly
HD 110067 f
Sub-Neptune · K-type orange
Radius 2.60 R⊕ · 104.9 ly