Key parameters at a glance
- A radius of 5.59 Earth radii
- A mass of 26.70 Earth masses
- Surface gravity around 0.85 g
- An orbital period of 71.525 days
- Semi-major axis 0.3091 AU
- Equilibrium temperature 340 K (67 °C)
- Distance from Earth 1,247.58 light-years
- Earth Similarity Index 0.483
- Travel time at Voyager 1 speed 22,001,002 years
Kepler-951 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#313of 574
top 54.4%
This planet
5.59R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | Kepler-951 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 5.59 | 11.21 |
| Mass (M⊕) | 1.00 | 26.70 | 317.83 |
| Density (g/cm³) | 5.51 | 0.84 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.85 | 2.53 |
| Insolation (S⊕) | 1.00 | 2.47 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 121395761
Gaia DR2
Gaia DR2 2099524776162690944
Gaia DR3
Gaia DR3 2099524776162690944
System
Kepler-951
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 71.53 Earth days (19.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3091 AU.
Transit Fingerprint
Depth
0.628 %
Duration
5.927 h
Impact parameter b
0.015
Rp / R★
0.069755
Transit midpoint (BJD)
2,455,024.6925
Photometric dip
Transit produces a flux drop of 6,279 ppm lasting ≈ 5.93 h.
Extended Orbital Architecture
Planet / star radius ratio
0.069755
Semi-major axis / stellar radius
98.609
Impact parameter (b)
0.015
Transit mid-time (BJD)
2,455,024.6925
Angular separation (arcsec)
0.80800
Eq. Temperature
340K
(67 °C)
Insolation (S⊕)
2.47
Earth = 1.00
Earth Similarity (ESI)
0.483
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
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-951
Spectral Class
K-type orange
Effective Temperature
4,834 K — cooler than the Sun (5,778 K)
Estimated Age
4.27 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.730 R☉
Stellar Mass
0.770 M☉
Metallicity [Fe/H]
-0.01
Extended Stellar Properties
Surface gravity (log g)
4.600 dex
Stellar density
3.546 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
2.586 mas
Total Proper Motion
15.960 mas/yr
PM Right Ascension
2.87 mas/yr
PM Declination
15.70 mas/yr
Galactic Cartesian (pc)
x = 0.240 · y = -0.749 · z = 0.617
Equatorial (J2000)
RA 287.73758° · Dec 38.11465°
Galactic ℓ, b
69.421° · 12.821°
Ecliptic λ, β
298.466° · 59.813°
HTM-20 index
-738041550
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HD 99492 b
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Kepler-1520 b
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Kepler-257 c
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Radius 5.41 R⊕ · 2,544.9 ly