Key parameters at a glance
- A radius of 15.02 Earth radii
- A mass of 294.63 Earth masses
- Surface gravity around 1.31 g
- An orbital period of 5.843 days
- Semi-major axis 0.0684 AU
- Equilibrium temperature 1,572 K (1298 °C)
- Distance from Earth 1,419.35 light-years
- Earth Similarity Index 0.074
- Travel time at Voyager 1 speed 25,030,167 years
TOI-2420 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#231of 1771
top 13.0%
This planet
15.02R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-2420 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 15.02 | 11.21 |
| Mass (M⊕) | 1.00 | 294.63 | 317.83 |
| Density (g/cm³) | 5.51 | 0.48 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.31 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,017.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 294.627 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 268532343
Gaia DR2
Gaia DR2 2356241774669130880
Gaia DR3
Gaia DR3 2356241774669130880
System
TOI-2420
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.84 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0684 AU.
Transit Fingerprint
Depth
0.267 %
Duration
4.554 h
Impact parameter b
0.849
Rp / R★
0.058100
Transit midpoint (BJD)
2,458,388.4119
Photometric dip
Transit produces a flux drop of 2,670 ppm lasting ≈ 4.55 h.
Extended Orbital Architecture
Planet / star radius ratio
0.058100
Semi-major axis / stellar radius
6.210
Impact parameter (b)
0.849
RV semi-amplitude (K)
94.250 m/s
Transit mid-time (BJD)
2,458,388.4119
Long. of periastron (ω)
15.50°
Angular separation (arcsec)
0.15700
Eq. Temperature
1,572K
(1298 °C)
Insolation (S⊕)
1,017.00
Earth = 1.00
Earth Similarity (ESI)
0.074
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
Carleo et al. 2024Instrument
TESS CCD Array
Publication
2024-10
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-2420
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,707 K — cooler than the Sun (5,778 K)
Estimated Age
5.30 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
2.369 R☉
Stellar Mass
1.158 M☉
Metallicity [Fe/H]
—
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.269 mas
Total Proper Motion
48.602 mas/yr
PM Right Ascension
44.89 mas/yr
PM Declination
18.64 mas/yr
Galactic Cartesian (pc)
x = 0.910 · y = 0.241 · z = -0.338
Equatorial (J2000)
RA 14.82681° · Dec -19.77116°
Galactic ℓ, b
137.118° · -82.425°
Ecliptic λ, β
5.421° · -23.963°
HTM-20 index
-4960833
Similar Worlds
HATS-53 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.02 R⊕ · 1,910.5 ly
WASP-114 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.01 R⊕ · 1,706.9 ly
Kepler-412 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.03 R⊕ · 3,542.8 ly
TrES-3 b
Gas Giant · G-type yellow (Sun-like)
Radius 14.98 R⊕ · 754.5 ly
TOI-5340 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.08 R⊕ · 1,737.2 ly
WASP-4 b
Gas Giant · G-type yellow (Sun-like)
Radius 15.12 R⊕ · 871.5 ly