Key parameters at a glance
- A radius of 2.91 Earth radii
- A mass of 8.80 Earth masses
- Surface gravity around 1.04 g
- An orbital period of 4.544 days
- Semi-major axis 0.0530 AU
- Equilibrium temperature 1,017 K (744 °C)
- Distance from Earth 2,685.05 light-years
- Earth Similarity Index 0.231
- Travel time at Voyager 1 speed 47,350,910 years
2 siblings around Kepler-325
Kepler-325 b 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-325 b this | Sub-Neptune | 2.91 | 8.80 | 4.544 | 1,017 | 2014 |
| Kepler-325 c | Sub-Neptune | 2.54 | 6.99 | 12.762 | 721 | 2014 |
| Kepler-325 d | Sub-Neptune | 2.79 | 8.20 | 38.715 | 498 | 2014 |
Kepler-325 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#608of 1978
top 30.7%
This planet
2.91R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-325 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.91 | 11.21 |
| Mass (M⊕) | 1.00 | 8.80 | 317.83 |
| Density (g/cm³) | 5.51 | 1.96 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.04 | 2.53 |
| Insolation (S⊕) | 1.00 | 210.55 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 267671250
Gaia DR2
Gaia DR2 2133021810218800384
Gaia DR3
Gaia DR3 2133021810218800384
System
Kepler-325
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.54 Earth days (1.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0530 AU.
Transit Fingerprint
Depth
0.091 %
Duration
1.756 h
Impact parameter b
0.180
Rp / R★
0.027448
Transit midpoint (BJD)
2,454,967.9001
Photometric dip
Transit produces a flux drop of 907 ppm lasting ≈ 1.76 h.
Extended Orbital Architecture
Planet / star radius ratio
0.027448
Semi-major axis / stellar radius
20.495
Impact parameter (b)
0.180
Transit mid-time (BJD)
2,454,967.9001
Angular separation (arcsec)
0.06440
Eq. Temperature
1,017K
(744 °C)
Insolation (S⊕)
210.55
Earth = 1.00
Earth Similarity (ESI)
0.231
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
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-325
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,752 K — cooler than the Sun (5,778 K)
Estimated Age
0.93 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.003 R☉
Stellar Mass
0.914 M☉
Metallicity [Fe/H]
0.02
Extended Stellar Properties
Surface gravity (log g)
4.411 dex
Stellar density
1.600 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.186 mas
Total Proper Motion
3.020 mas/yr
PM Right Ascension
-2.70 mas/yr
PM Declination
1.36 mas/yr
Galactic Cartesian (pc)
x = 0.219 · y = -0.607 · z = 0.764
Equatorial (J2000)
RA 289.83542° · Dec 49.82561°
Galactic ℓ, b
81.115° · 16.181°
Ecliptic λ, β
310.882° · 70.462°
HTM-20 index
945639888
Similar Worlds
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Radius 2.91 R⊕ · 1,585.5 ly
TOI-1221 b
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TOI-1117 c
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HD 45184 c
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Kepler-1801 c
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K2-365 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.91 R⊕ · 610.6 ly