Key parameters at a glance
- A radius of 1.21 Earth radii
- A mass of 6.90 Earth masses
- Surface gravity around 4.71 g
- An orbital period of 6.767 days
- Semi-major axis 0.0660 AU
- Equilibrium temperature 781 K (508 °C)
- Distance from Earth 1,590.58 light-years
- Earth Similarity Index 0.299
- Travel time at Voyager 1 speed 28,049,899 years
- Almost certainly tidally locked to its host star given the close orbit
2 siblings around Kepler-326
Kepler-326 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-326 b | Super-Earth | 1.52 | 44.60 | 2.248 | 1,127 | 2014 |
| Kepler-326 c | Super-Earth | 1.40 | 17.40 | 4.580 | 889 | 2014 |
| Kepler-326 d this | Rocky Terrestrial | 1.21 | 6.90 | 6.767 | 781 | 2014 |
Kepler-326 d Planet Profile
Physical Specs
Classification
Planet Type
Rocky Terrestrial
Discovery
Size rank in cohort
Rank by radius
#56of 570
top 9.6%
This planet
1.21R⊕
Rocky Terrestrial median
1.01R⊕
Nearest-size peers
| Metric | Earth | Kepler-326 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.21 | 11.21 |
| Mass (M⊕) | 1.00 | 6.90 | 317.83 |
| Density (g/cm³) | 5.51 | 21.40 | 1.33 |
| Surface Gravity (g) | 1.00 | 4.71 | 2.53 |
| Insolation (S⊕) | 1.00 | 180.64 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 6.900 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 270956861
Gaia DR2
Gaia DR2 2128098197152438144
Gaia DR3
Gaia DR3 2128098197152438144
System
Kepler-326
Percentile among Rocky Terrestrial cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 6.77 Earth days (1.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0660 AU.
Transit Fingerprint
Depth
0.025 %
Duration
1.631 h
Impact parameter b
0.220
Rp / R★
0.013944
Transit midpoint (BJD)
2,454,969.6161
Photometric dip
Transit produces a flux drop of 249 ppm lasting ≈ 1.63 h.
Extended Orbital Architecture
Planet / star radius ratio
0.013944
Semi-major axis / stellar radius
31.420
Impact parameter (b)
0.220
Transit mid-time (BJD)
2,454,969.6161
Angular separation (arcsec)
0.13500
Eq. Temperature
781K
(508 °C)
Insolation (S⊕)
180.64
Earth = 1.00
Earth Similarity (ESI)
0.299
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
Rowe et al. 2014Instrument
Kepler CCD Array
Publication
2014-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
Host System: Kepler-326
Spectral Class
K-type orange
Effective Temperature
5,105 K — cooler than the Sun (5,778 K)
Estimated Age
13.18 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.801 R☉
Stellar Mass
0.910 M☉
Metallicity [Fe/H]
0.24
Extended Stellar Properties
Surface gravity (log g)
4.556 dex
Stellar density
0.810 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.023 mas
Total Proper Motion
8.057 mas/yr
PM Right Ascension
4.96 mas/yr
PM Declination
6.35 mas/yr
Galactic Cartesian (pc)
x = 0.286 · y = -0.633 · z = 0.719
Equatorial (J2000)
RA 294.32559° · Dec 46.00226°
Galactic ℓ, b
78.860° · 11.837°
Ecliptic λ, β
314.163° · 65.753°
HTM-20 index
-1514225057
Similar Worlds
Kepler-415 b
Rocky Terrestrial · K-type orange
Radius 1.21 R⊕ · 1,730.2 ly
Kepler-80 f
Rocky Terrestrial · K-type orange
Radius 1.21 R⊕ · 1,205.0 ly
HD 20781 b
Rocky Terrestrial · K-type orange
Radius 1.21 R⊕ · 117.3 ly
K2-228 b
Rocky Terrestrial · K-type orange
Radius 1.21 R⊕ · 422.2 ly
Kepler-1284 b
Rocky Terrestrial · K-type orange
Radius 1.21 R⊕ · 2,877.8 ly
Kepler-169 c
Rocky Terrestrial · K-type orange
Radius 1.21 R⊕ · 1,325.9 ly