Key parameters at a glance
- A radius of 14.57 Earth radii
- A mass of 238.37 Earth masses
- Surface gravity around 1.12 g
- An orbital period of 3.355 days
- Semi-major axis 0.0465 AU
- Equilibrium temperature 1,637 K (1364 °C)
- Distance from Earth 1,354.67 light-years
- Earth Similarity Index 0.071
- Travel time at Voyager 1 speed 23,889,593 years
HAT-P-24 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#270of 1771
top 15.2%
This planet
14.57R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HAT-P-24 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 14.57 | 11.21 |
| Mass (M⊕) | 1.00 | 238.37 | 317.83 |
| Density (g/cm³) | 5.51 | 0.44 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.12 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,294.93 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 238.373 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 440777904
Gaia DR2
Gaia DR2 3167323052618369408
Gaia DR3
Gaia DR3 3167323052618369408
System
HAT-P-24
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.36 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0465 AU.
Transit Fingerprint
Depth
0.940 %
Duration
3.694 h
Impact parameter b
0.189
Rp / R★
0.100000
Transit midpoint (BJD)
2,458,491.6957
Photometric dip
Transit produces a flux drop of 9,400 ppm lasting ≈ 3.69 h.
Extended Orbital Architecture
Planet / star radius ratio
0.100000
Semi-major axis / stellar radius
7.610
Impact parameter (b)
0.189
RV semi-amplitude (K)
83.000 m/s
Transit mid-time (BJD)
2,458,491.6957
Long. of periastron (ω)
197.00°
Sky-projected obliquity (λ)
20.00°
Angular separation (arcsec)
0.11200
Eq. Temperature
1,637K
(1364 °C)
Insolation (S⊕)
1,294.93
Earth = 1.00
Earth Similarity (ESI)
0.071
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
Kipping et al. 2010Instrument
2K CCD Sensor
Publication
2010-12
Observation locale
Ground
Discovery cohort
Planets confirmed in 2010 at HATNet (12 shown).
Host System: HAT-P-24
Spectral Class
F-type yellow-white
Effective Temperature
6,373 K — hotter than the Sun (5,778 K)
Estimated Age
2.80 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.380 R☉
Stellar Mass
1.370 M☉
Metallicity [Fe/H]
-0.16
Extended Stellar Properties
Surface gravity (log g)
4.270 dex
Stellar density
0.740 g/cm³
Systemic radial velocity
-2.09 km/s
Rotational v·sin i
10.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.379 mas
Total Proper Motion
8.331 mas/yr
PM Right Ascension
8.15 mas/yr
PM Declination
-1.72 mas/yr
Galactic Cartesian (pc)
x = -0.313 · y = 0.917 · z = 0.246
Equatorial (J2000)
RA 108.82512° · Dec 14.26261°
Galactic ℓ, b
202.738° · 11.653°
Ecliptic λ, β
108.405° · -7.982°
HTM-20 index
-1559981576
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