Key parameters at a glance
- A radius of 15.98 Earth radii
- A mass of 670.94 Earth masses
- Surface gravity around 2.63 g
- An orbital period of 3.548 days
- Semi-major axis 0.0538 AU
- Equilibrium temperature 1,750 K (1477 °C)
- Distance from Earth 2,934.68 light-years
- Earth Similarity Index 0.059
- Travel time at Voyager 1 speed 51,753,020 years
Kepler-5 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#162of 1771
top 9.1%
This planet
15.98R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | Kepler-5 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 15.98 | 11.21 |
| Mass (M⊕) | 1.00 | 670.94 | 317.83 |
| Density (g/cm³) | 5.51 | 0.40 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.63 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,822.76 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 670.939 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 268823307
Gaia DR2
Gaia DR2 2079018300195390464
Gaia DR3
Gaia DR3 2079018300195390464
System
Kepler-5
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.55 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0538 AU.
Transit Fingerprint
Depth
0.725 %
Duration
4.569 h
Impact parameter b
0.097
Rp / R★
0.079965
Transit midpoint (BJD)
2,454,955.9014
Photometric dip
Transit produces a flux drop of 7,252 ppm lasting ≈ 4.57 h.
Extended Orbital Architecture
Planet / star radius ratio
0.079965
Semi-major axis / stellar radius
6.450
Impact parameter (b)
0.097
RV semi-amplitude (K)
227.500 m/s
Occultation depth
0.002 ppm
Transit mid-time (BJD)
2,454,955.9014
Angular separation (arcsec)
0.05980
Eq. Temperature
1,750K
(1477 °C)
Insolation (S⊕)
1,822.76
Earth = 1.00
Earth Similarity (ESI)
0.059
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Radial velocity
Stellar wobble has been measured spectroscopically.
Orbital-brightness modulation
Host star brightness varies with the planet's orbit.
Discovery Paper
Primary reference
Koch et al. 2010Instrument
Kepler CCD Array
Publication
2010-04
Observation locale
Space
Discovery cohort
Planets confirmed in 2009 at Kepler (3 shown).
Host System: Kepler-5
Spectral Class
F-type yellow-white
Effective Temperature
6,297 K — hotter than the Sun (5,778 K)
Estimated Age
2.88 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.793 R☉
Stellar Mass
1.374 M☉
Metallicity [Fe/H]
0.04
Extended Stellar Properties
Surface gravity (log g)
3.960 dex
Stellar density
0.399 g/cm³
Systemic radial velocity
-46.70 km/s
Rotational v·sin i
4.80 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 15 bands
Astrometric Data
Parallax
1.083 mas
Total Proper Motion
3.245 mas/yr
PM Right Ascension
-0.20 mas/yr
PM Declination
-3.24 mas/yr
Galactic Cartesian (pc)
x = 0.353 · y = -0.626 · z = 0.695
Equatorial (J2000)
RA 299.40703° · Dec 44.03504°
Galactic ℓ, b
78.866° · 7.743°
Ecliptic λ, β
319.814° · 62.482°
HTM-20 index
1741276412
Observation Record
Photometric series
1
Emission spectra
5
Archive notes
1
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