Key parameters at a glance
- A radius of 2.66 Earth radii
- A mass of 7.56 Earth masses
- Surface gravity around 1.07 g
- An orbital period of 122.080 days
- Semi-major axis 0.4545 AU
- Equilibrium temperature 297 K (24 °C)
- Distance from Earth 1,471.98 light-years
- Earth Similarity Index 0.735
- Travel time at Voyager 1 speed 25,958,386 years
2 siblings around Kepler-196
Kepler-196 d shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-196 b | Super-Earth | 1.90 | 4.27 | 20.740 | 536 | 2014 |
| Kepler-196 c | Sub-Neptune | 2.24 | 5.65 | 47.428 | 407 | 2014 |
| Kepler-196 d this | Sub-Neptune | 2.66 | 7.56 | 122.080 | 297 | 2021 |
Kepler-196 d Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#927of 1978
top 46.8%
This planet
2.66R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-196 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.66 | 11.21 |
| Mass (M⊕) | 1.00 | 7.56 | 317.83 |
| Density (g/cm³) | 5.51 | 2.21 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.07 | 2.53 |
| Insolation (S⊕) | 1.00 | 1.80 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 164828012
Gaia DR2
Gaia DR2 2104094071610116608
Gaia DR3
Gaia DR3 2104094071610116608
System
Kepler-196
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 122.08 Earth days (33.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.4545 AU.
Transit Fingerprint
Depth
0.085 %
Duration
4.121 h
Impact parameter b
0.961
Rp / R★
0.034713
Transit midpoint (BJD)
2,454,988.0218
Photometric dip
Transit produces a flux drop of 855 ppm lasting ≈ 4.12 h.
Extended Orbital Architecture
Planet / star radius ratio
0.034713
Semi-major axis / stellar radius
87.900
Impact parameter (b)
0.961
Transit mid-time (BJD)
2,454,988.0218
Angular separation (arcsec)
1.01000
Eq. Temperature
297K
(24 °C)
Insolation (S⊕)
1.80
Earth = 1.00
Earth Similarity (ESI)
0.735
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure.
Discovery Paper
Primary reference
Valizadegan et al. 2022Instrument
Kepler CCD Array
Publication
2022-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Kepler (12 shown).
Host System: Kepler-196
Spectral Class
K-type orange
Effective Temperature
5,132 K — cooler than the Sun (5,778 K)
Estimated Age
3.09 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.770 R☉
Stellar Mass
0.805 M☉
Metallicity [Fe/H]
-0.06
Extended Stellar Properties
Surface gravity (log g)
4.571 dex
Stellar density
0.948 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.187 mas
Total Proper Motion
15.875 mas/yr
PM Right Ascension
-3.03 mas/yr
PM Declination
-15.58 mas/yr
Galactic Cartesian (pc)
x = 0.192 · y = -0.717 · z = 0.670
Equatorial (J2000)
RA 284.96851° · Dec 42.07912°
Galactic ℓ, b
72.315° · 16.336°
Ecliptic λ, β
296.098° · 64.168°
HTM-20 index
2038205939
Similar Worlds
Kepler-1110 b
Sub-Neptune · K-type orange
Radius 2.66 R⊕ · 2,370.6 ly
Kepler-1987 d
Sub-Neptune · K-type orange
Radius 2.66 R⊕ · 1,942.9 ly
Kepler-357 c
Sub-Neptune · K-type orange
Radius 2.67 R⊕ · 2,245.8 ly
K2-348 c
Sub-Neptune · K-type orange
Radius 2.67 R⊕ · 658.4 ly
Kepler-80 b
Sub-Neptune · K-type orange
Radius 2.67 R⊕ · 1,205.0 ly
TOI-1064 c
Sub-Neptune · K-type orange
Radius 2.65 R⊕ · 222.0 ly