Key parameters at a glance
- A radius of 4.00 Earth radii
- A mass of 15.10 Earth masses
- Surface gravity around 0.94 g
- An orbital period of 6.010 days
- Semi-major axis 0.0580 AU
- Equilibrium temperature 768 K (495 °C)
- Distance from Earth 1,236.04 light-years
- Earth Similarity Index 0.272
- Travel time at Voyager 1 speed 21,797,563 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-547 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#571of 574
top 99.3%
This planet
4.00R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | Kepler-547 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 4.00 | 11.21 |
| Mass (M⊕) | 1.00 | 15.10 | 317.83 |
| Density (g/cm³) | 5.51 | 1.30 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.94 | 2.53 |
| Insolation (S⊕) | 1.00 | 87.71 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 158171456
Gaia DR2
Gaia DR2 2106279179170588288
Gaia DR3
Gaia DR3 2106279179170588288
System
Kepler-547
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 6.01 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0580 AU.
Transit Fingerprint
Depth
0.274 %
Duration
2.224 h
Impact parameter b
0.436
Rp / R★
0.049896
Transit midpoint (BJD)
2,455,007.0848
Photometric dip
Transit produces a flux drop of 2,739 ppm lasting ≈ 2.22 h.
Extended Orbital Architecture
Planet / star radius ratio
0.049896
Semi-major axis / stellar radius
18.300
Impact parameter (b)
0.436
Transit mid-time (BJD)
2,455,007.0848
Angular separation (arcsec)
0.15300
Eq. Temperature
768K
(495 °C)
Insolation (S⊕)
87.71
Earth = 1.00
Earth Similarity (ESI)
0.272
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-547
Spectral Class
K-type orange
Effective Temperature
4,828 K — cooler than the Sun (5,778 K)
Estimated Age
2.88 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.730 R☉
Stellar Mass
0.780 M☉
Metallicity [Fe/H]
0.01
Extended Stellar Properties
Surface gravity (log g)
4.610 dex
Stellar density
4.148 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.610 mas
Total Proper Motion
19.362 mas/yr
PM Right Ascension
-14.77 mas/yr
PM Declination
-12.51 mas/yr
Galactic Cartesian (pc)
x = 0.199 · y = -0.687 · z = 0.699
Equatorial (J2000)
RA 286.11859° · Dec 44.34521°
Galactic ℓ, b
74.832° · 16.412°
Ecliptic λ, β
299.400° · 66.147°
HTM-20 index
103049139
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