Key parameters at a glance
- A radius of 10.54 Earth radii
- A mass of 168.45 Earth masses
- Surface gravity around 1.52 g
- An orbital period of 31.034 days
- Equilibrium temperature 615 K (342 °C)
- Distance from Earth 1,251.94 light-years
- Earth Similarity Index 0.245
- Travel time at Voyager 1 speed 22,077,904 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-4582 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1727of 1771
top 97.5%
This planet
10.54R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-4582 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 10.54 | 11.21 |
| Mass (M⊕) | 1.00 | 168.45 | 317.83 |
| Density (g/cm³) | 5.51 | 0.79 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.52 | 2.53 |
| Insolation (S⊕) | 1.00 | 33.73 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 168.449 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 219854519
Gaia DR2
Gaia DR2 1636984973365053056
Gaia DR3
Gaia DR3 1636984973365053056
System
TOI-4582
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 31.03 Earth days (8.5% of a terrestrial year) on a highly eccentric trajectory.
Transit Fingerprint
Depth
0.157 %
Duration
12.059 h
Impact parameter b
0.520
Rp / R★
0.035100
Transit midpoint (BJD)
2,458,712.1770
Photometric dip
Transit produces a flux drop of 1,572 ppm lasting ≈ 12.06 h.
Extended Orbital Architecture
Planet / star radius ratio
0.035100
Impact parameter (b)
0.520
RV semi-amplitude (K)
31.000 m/s
Transit mid-time (BJD)
2,458,712.1770
Long. of periastron (ω)
-0.17°
Eq. Temperature
615K
(342 °C)
Insolation (S⊕)
33.73
Earth = 1.00
Earth Similarity (ESI)
0.245
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.
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
Grunblatt et al. 2023Instrument
TESS CCD Array
Publication
2023-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-4582
Spectral Class
K-type orange
Effective Temperature
5,190 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
2.500 R☉
Stellar Mass
1.340 M☉
Metallicity [Fe/H]
0.17
Extended Stellar Properties
Surface gravity (log g)
3.770 dex
Stellar density
0.084 g/cm³
Rotational v·sin i
2.70 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.576 mas
Total Proper Motion
20.112 mas/yr
PM Right Ascension
-20.08 mas/yr
PM Declination
1.06 mas/yr
Galactic Cartesian (pc)
x = -0.082 · y = -0.351 · z = 0.933
Equatorial (J2000)
RA 256.86014° · Dec 68.86563°
Galactic ℓ, b
99.785° · 34.470°
Ecliptic λ, β
149.187° · 84.524°
HTM-20 index
-864598353
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