Key parameters at a glance
- A radius of 12.71 Earth radii
- A mass of 1,458.83 Earth masses
- Surface gravity around 9.03 g
- An orbital period of 5.551 days
- Semi-major axis 0.0665 AU
- Equilibrium temperature 1,391 K (1118 °C)
- Distance from Earth 314.80 light-years
- Earth Similarity Index 0.119
- Travel time at Voyager 1 speed 5,551,444 years
KELT-24 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1129of 1771
top 63.7%
This planet
12.71R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | KELT-24 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.71 | 11.21 |
| Mass (M⊕) | 1.00 | 1,458.83 | 317.83 |
| Density (g/cm³) | 5.51 | 3.90 | 1.33 |
| Surface Gravity (g) | 1.00 | 9.03 | 2.53 |
| Insolation (S⊕) | 1.00 | 624.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,458.832 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 1,458.832 M⊕ | Lower bound from radial-velocity fitting. |
| Computed mass | 1,646.532 M⊕ | Model-computed mass (e.g. from mass-radius relation). |
Star Catalogue Identifiers
HD
HD 93148
HIP
HIP 52796
TIC
TIC 349827430
Gaia DR2
Gaia DR2 1076970406751899008
Gaia DR3
Gaia DR3 1076970406751899008
System
KELT-24
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.55 Earth days (1.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0665 AU.
Transit Fingerprint
Depth
0.757 %
Duration
4.303 h
Impact parameter b
0.061
Rp / R★
0.087024
Transit midpoint (BJD)
2,459,173.3474
Photometric dip
Transit produces a flux drop of 7,573 ppm lasting ≈ 4.30 h.
Extended Orbital Architecture
Planet / star radius ratio
0.087024
Semi-major axis / stellar radius
10.670
Impact parameter (b)
0.061
RV semi-amplitude (K)
449.100 m/s
Transit mid-time (BJD)
2,459,173.3474
Long. of periastron (ω)
3.00°
Sky-projected obliquity (λ)
1.40°
Angular separation (arcsec)
0.68900
Eq. Temperature
1,391K
(1118 °C)
Insolation (S⊕)
624.00
Earth = 1.00
Earth Similarity (ESI)
0.119
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.
Discovery Paper
Primary reference
Rodriguez et al. 2019Instrument
Apogee 4K CCD Sensor
Publication
2019-11
Observation locale
Ground
Host System: KELT-24
Spectral Class
F-type yellow-white
Effective Temperature
6,426 K — hotter than the Sun (5,778 K)
Estimated Age
1.98 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.338 R☉
Stellar Mass
1.268 M☉
Metallicity [Fe/H]
0.14
Extended Stellar Properties
Surface gravity (log g)
4.287 dex
Stellar density
0.744 g/cm³
Systemic radial velocity
-5.63 km/s
Rotational v·sin i
19.74 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
10.332 mas
Total Proper Motion
66.092 mas/yr
PM Right Ascension
-56.18 mas/yr
PM Declination
-34.81 mas/yr
Galactic Cartesian (pc)
x = -0.299 · y = 0.098 · z = 0.949
Equatorial (J2000)
RA 161.90903° · Dec 71.65573°
Galactic ℓ, b
135.573° · 42.301°
Ecliptic λ, β
122.628° · 56.303°
HTM-20 index
1086539918
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