Key parameters at a glance
- A radius of 2.34 Earth radii
- A mass of 6.08 Earth masses
- Surface gravity around 1.11 g
- An orbital period of 33.868 days
- Semi-major axis 0.1805 AU
- Equilibrium temperature 394 K (121 °C)
- Distance from Earth 1,993.19 light-years
- Earth Similarity Index 0.623
- Travel time at Voyager 1 speed 35,149,873 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-925 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1429of 1978
top 72.2%
This planet
2.34R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-925 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.34 | 11.21 |
| Mass (M⊕) | 1.00 | 6.08 | 317.83 |
| Density (g/cm³) | 5.51 | 2.61 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.11 | 2.53 |
| Insolation (S⊕) | 1.00 | 5.83 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 122294985
Gaia DR2
Gaia DR2 2101170951231556864
Gaia DR3
Gaia DR3 2101170951231556864
System
Kepler-925
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 33.87 Earth days (9.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1805 AU.
Transit Fingerprint
Depth
0.089 %
Duration
3.682 h
Impact parameter b
0.680
Rp / R★
0.030005
Transit midpoint (BJD)
2,454,970.5136
Photometric dip
Transit produces a flux drop of 895 ppm lasting ≈ 3.68 h.
Extended Orbital Architecture
Planet / star radius ratio
0.030005
Semi-major axis / stellar radius
46.200
Impact parameter (b)
0.680
Transit mid-time (BJD)
2,454,970.5136
Angular separation (arcsec)
0.29500
Eq. Temperature
394K
(121 °C)
Insolation (S⊕)
5.83
Earth = 1.00
Earth Similarity (ESI)
0.623
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-925
Spectral Class
K-type orange
Effective Temperature
4,673 K — cooler than the Sun (5,778 K)
Estimated Age
2.57 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.720 R☉
Stellar Mass
0.770 M☉
Metallicity [Fe/H]
0.12
Extended Stellar Properties
Surface gravity (log g)
4.620 dex
Stellar density
1.631 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.609 mas
Total Proper Motion
4.048 mas/yr
PM Right Ascension
-0.17 mas/yr
PM Declination
-4.04 mas/yr
Galactic Cartesian (pc)
x = 0.261 · y = -0.714 · z = 0.649
Equatorial (J2000)
RA 290.10656° · Dec 40.49062°
Galactic ℓ, b
72.420° · 12.163°
Ecliptic λ, β
303.366° · 61.621°
HTM-20 index
-1046072041
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