Key parameters at a glance
- A radius of 3.04 Earth radii
- A mass of 9.48 Earth masses
- Surface gravity around 1.03 g
- An orbital period of 11.598 days
- Semi-major axis 0.0798 AU
- Equilibrium temperature 396 K (123 °C)
- Distance from Earth 962.80 light-years
- Earth Similarity Index 0.560
- Travel time at Voyager 1 speed 16,978,968 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-676 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#481of 1978
top 24.3%
This planet
3.04R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-676 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.04 | 11.21 |
| Mass (M⊕) | 1.00 | 9.48 | 317.83 |
| Density (g/cm³) | 5.51 | 1.85 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.03 | 2.53 |
| Insolation (S⊕) | 1.00 | 8.24 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 27776674
Gaia DR2
Gaia DR2 2135301441422463360
Gaia DR3
Gaia DR3 2135301441422463360
System
Kepler-676
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 11.60 Earth days (3.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0798 AU.
Transit Fingerprint
Depth
0.280 %
Duration
2.626 h
Impact parameter b
0.798
Rp / R★
0.057316
Transit midpoint (BJD)
2,455,013.3955
Photometric dip
Transit produces a flux drop of 2,805 ppm lasting ≈ 2.63 h.
Extended Orbital Architecture
Planet / star radius ratio
0.057316
Semi-major axis / stellar radius
23.400
Impact parameter (b)
0.798
Transit mid-time (BJD)
2,455,013.3955
Angular separation (arcsec)
0.27000
Eq. Temperature
396K
(123 °C)
Insolation (S⊕)
8.24
Earth = 1.00
Earth Similarity (ESI)
0.560
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-676
Spectral Class
K-type orange
Effective Temperature
3,701 K — cooler than the Sun (5,778 K)
Estimated Age
4.27 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.490 R☉
Stellar Mass
0.510 M☉
Metallicity [Fe/H]
-0.02
Extended Stellar Properties
Surface gravity (log g)
4.770 dex
Stellar density
4.420 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
3.359 mas
Total Proper Motion
33.370 mas/yr
PM Right Ascension
8.44 mas/yr
PM Declination
32.28 mas/yr
Galactic Cartesian (pc)
x = 0.282 · y = -0.573 · z = 0.769
Equatorial (J2000)
RA 296.22203° · Dec 50.28736°
Galactic ℓ, b
83.352° · 12.671°
Ecliptic λ, β
322.081° · 69.032°
HTM-20 index
-152954667
Similar Worlds
TOI-1438 b
Sub-Neptune · K-type orange
Radius 3.04 R⊕ · 360.4 ly
HD 216520 c
Sub-Neptune · K-type orange
Radius 3.03 R⊕ · 63.8 ly
K2-273 b
Sub-Neptune · K-type orange
Radius 3.05 R⊕ · 1,004.9 ly
Kepler-245 d
Sub-Neptune · K-type orange
Radius 3.03 R⊕ · 2,809.9 ly
TOI-220 b
Sub-Neptune · K-type orange
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Kepler-248 b
Sub-Neptune · K-type orange
Radius 3.02 R⊕ · 2,409.6 ly