Key parameters at a glance
- A radius of 5.63 Earth radii
- A mass of 27.00 Earth masses
- Surface gravity around 0.85 g
- An orbital period of 51.929 days
- Semi-major axis 0.2742 AU
- Equilibrium temperature 574 K (301 °C)
- Distance from Earth 6,675.37 light-years
- Earth Similarity Index 0.309
- Travel time at Voyager 1 speed 117,720,137 years
Kepler-827 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#308of 574
top 53.5%
This planet
5.63R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | Kepler-827 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 5.63 | 11.21 |
| Mass (M⊕) | 1.00 | 27.00 | 317.83 |
| Density (g/cm³) | 5.51 | 0.83 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.85 | 2.53 |
| Insolation (S⊕) | 1.00 | 23.60 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 271346509
Gaia DR2
Gaia DR2 2077954724552784640
Gaia DR3
Gaia DR3 2077954724552784640
System
Kepler-827
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 51.93 Earth days (14.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2742 AU.
Transit Fingerprint
Depth
0.343 %
Duration
5.308 h
Impact parameter b
0.166
Rp / R★
0.056522
Transit midpoint (BJD)
2,454,984.9318
Photometric dip
Transit produces a flux drop of 3,426 ppm lasting ≈ 5.31 h.
Extended Orbital Architecture
Planet / star radius ratio
0.056522
Semi-major axis / stellar radius
77.980
Impact parameter (b)
0.166
Transit mid-time (BJD)
2,454,984.9318
Angular separation (arcsec)
0.13400
Eq. Temperature
574K
(301 °C)
Insolation (S⊕)
23.60
Earth = 1.00
Earth Similarity (ESI)
0.309
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Transit timing variations
Gravitational interactions from neighbours have been detected.
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-827
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,602 K — cooler than the Sun (5,778 K)
Estimated Age
4.37 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.910 R☉
Stellar Mass
0.930 M☉
Metallicity [Fe/H]
-0.06
Extended Stellar Properties
Surface gravity (log g)
4.500 dex
Stellar density
3.327 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.461 mas
Total Proper Motion
3.358 mas/yr
PM Right Ascension
-3.25 mas/yr
PM Declination
-0.83 mas/yr
Galactic Cartesian (pc)
x = 0.310 · y = -0.666 · z = 0.678
Equatorial (J2000)
RA 294.96600° · Dec 42.70856°
Galactic ℓ, b
76.100° · 9.911°
Ecliptic λ, β
312.252° · 62.533°
HTM-20 index
-1056316800
Similar Worlds
TIC 434398831 c
Neptune-like · G-type yellow (Sun-like)
Radius 5.63 R⊕ · 707.8 ly
TOI-5795 b
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Kepler-238 e
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DS Tuc A b
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Radius 5.70 R⊕ · 143.7 ly
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TOI-3862 b
Neptune-like · G-type yellow (Sun-like)
Radius 5.53 R⊕ · 812.2 ly