Key parameters at a glance
- A radius of 16.95 Earth radii
- A mass of 2,949.46 Earth masses
- Surface gravity around 10.27 g
- An orbital period of 1.764 days
- Semi-major axis 0.0364 AU
- Equilibrium temperature 2,550 K (2277 °C)
- Distance from Earth 1,693.06 light-years
- Earth Similarity Index 0.053
- Travel time at Voyager 1 speed 29,857,160 years
KOI-13 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#111of 1771
top 6.2%
This planet
16.95R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | KOI-13 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 16.95 | 11.21 |
| Mass (M⊕) | 1.00 | 2,949.46 | 317.83 |
| Density (g/cm³) | 5.51 | 3.60 | 1.33 |
| Surface Gravity (g) | 1.00 | 10.27 | 2.53 |
| Insolation (S⊕) | 1.00 | 25,339.90 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 2,949.462 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 2,923.900 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
TIC
TIC 158324245
Gaia DR2
Gaia DR2 2130632159134827392
Gaia DR3
Gaia DR3 2130632159136095104
System
KOI-13
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.76 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0364 AU.
Transit Fingerprint
Depth
0.459 %
Duration
3.169 h
Impact parameter b
0.254
Rp / R★
0.087373
Transit midpoint (BJD)
2,454,953.5660
Photometric dip
Transit produces a flux drop of 4,591 ppm lasting ≈ 3.17 h.
Extended Orbital Architecture
Planet / star radius ratio
0.087373
Semi-major axis / stellar radius
4.501
Impact parameter (b)
0.254
Occultation depth
0.017 ppm
Transit mid-time (BJD)
2,454,953.5660
Long. of periastron (ω)
5.00°
Sky-projected obliquity (λ)
23.00°
Angular separation (arcsec)
0.07010
Eq. Temperature
2,550K
(2277 °C)
Insolation (S⊕)
25,339.90
Earth = 1.00
Earth Similarity (ESI)
0.053
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.
Transit timing variations
Gravitational interactions from neighbours have been detected.
Orbital-brightness modulation
Host star brightness varies with the planet's orbit.
Discovery Paper
Primary reference
Borucki et al. 2011Instrument
Kepler CCD Array
Publication
2011-07
Observation locale
Space
Discovery cohort
Planets confirmed in 2011 at Kepler (12 shown).
Host System: KOI-13
Spectral Class
A-type white
Effective Temperature
7,650 K — hotter than the Sun (5,778 K)
Estimated Age
1.12 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.740 R☉
Stellar Mass
1.720 M☉
Metallicity [Fe/H]
0.20
Extended Stellar Properties
Surface gravity (log g)
4.200 dex
Stellar density
0.496 g/cm³
Rotational v·sin i
65.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.905 mas
Total Proper Motion
16.382 mas/yr
PM Right Ascension
-4.40 mas/yr
PM Declination
-15.78 mas/yr
Galactic Cartesian (pc)
x = 0.200 · y = -0.654 · z = 0.730
Equatorial (J2000)
RA 286.97139° · Dec 46.86825°
Galactic ℓ, b
77.506° · 16.806°
Ecliptic λ, β
302.797° · 68.384°
HTM-20 index
-1787370383
Observation Record
Transmission spectra
2
Emission spectra
6
Archive notes
3
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