Key parameters at a glance
- A radius of 4.13 Earth radii
- A mass of 16.00 Earth masses
- Surface gravity around 0.94 g
- An orbital period of 99.748 days
- Semi-major axis 0.3907 AU
- Equilibrium temperature 391 K (118 °C)
- Distance from Earth 3,352.23 light-years
- Earth Similarity Index 0.497
- Travel time at Voyager 1 speed 59,116,597 years
Kepler-966 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#537of 574
top 93.4%
This planet
4.13R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | Kepler-966 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 4.13 | 11.21 |
| Mass (M⊕) | 1.00 | 16.00 | 317.83 |
| Density (g/cm³) | 5.51 | 1.25 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.94 | 2.53 |
| Insolation (S⊕) | 1.00 | 10.97 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 28159758
Gaia DR2
Gaia DR2 2087263361789975040
Gaia DR3
Gaia DR3 2087263361789975040
System
Kepler-966
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 99.75 Earth days (27.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3907 AU.
Transit Fingerprint
Depth
0.129 %
Duration
6.744 h
Impact parameter b
0.780
Rp / R★
0.036953
Transit midpoint (BJD)
2,455,041.3954
Photometric dip
Transit produces a flux drop of 1,287 ppm lasting ≈ 6.74 h.
Extended Orbital Architecture
Planet / star radius ratio
0.036953
Semi-major axis / stellar radius
69.900
Impact parameter (b)
0.780
Transit mid-time (BJD)
2,455,041.3954
Angular separation (arcsec)
0.38000
Eq. Temperature
391K
(118 °C)
Insolation (S⊕)
10.97
Earth = 1.00
Earth Similarity (ESI)
0.497
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
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-966
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,840 K — hotter than the Sun (5,778 K)
Estimated Age
4.07 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.020 R☉
Stellar Mass
1.020 M☉
Metallicity [Fe/H]
0.04
Extended Stellar Properties
Surface gravity (log g)
4.430 dex
Stellar density
0.650 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.944 mas
Total Proper Motion
5.255 mas/yr
PM Right Ascension
-3.40 mas/yr
PM Declination
4.01 mas/yr
Galactic Cartesian (pc)
x = 0.294 · y = -0.570 · z = 0.767
Equatorial (J2000)
RA 297.27058° · Dec 50.12184°
Galactic ℓ, b
83.523° · 12.000°
Ecliptic λ, β
323.467° · 68.556°
HTM-20 index
-884654293
Similar Worlds
Kepler-697 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.13 R⊕ · 4,166.1 ly
Kepler-1799 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.13 R⊕ · 7,353.8 ly
HD 4308 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.12 R⊕ · 71.8 ly
K2-79 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.15 R⊕ · 835.0 ly
Kepler-315 c
Neptune-like · G-type yellow (Sun-like)
Radius 4.15 R⊕ · 3,785.5 ly
HD 164595 b
Neptune-like · G-type yellow (Sun-like)
Radius 4.16 R⊕ · 92.2 ly