Key parameters at a glance
- A radius of 16.12 Earth radii
- A mass of 394.11 Earth masses
- Surface gravity around 1.52 g
- An orbital period of 3.331 days
- Semi-major axis 0.0473 AU
- Equilibrium temperature 1,689 K (1416 °C)
- Distance from Earth 1,426.88 light-years
- Earth Similarity Index 0.068
- Travel time at Voyager 1 speed 25,163,033 years
TOI-2346 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#153of 1771
top 8.6%
This planet
16.12R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-2346 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 16.12 | 11.21 |
| Mass (M⊕) | 1.00 | 394.11 | 317.83 |
| Density (g/cm³) | 5.51 | 0.52 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.52 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,360.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 394.107 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 317483660
Gaia DR2
Gaia DR2 2996776253547606656
Gaia DR3
Gaia DR3 2996776253547606656
System
TOI-2346
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.33 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0473 AU.
Transit Fingerprint
Depth
1.147 %
Duration
3.797 h
Impact parameter b
0.130
Transit midpoint (BJD)
2,459,040.8396
Photometric dip
Transit produces a flux drop of 11,470 ppm lasting ≈ 3.80 h.
Extended Orbital Architecture
Semi-major axis / stellar radius
7.400
Impact parameter (b)
0.130
RV semi-amplitude (K)
144.000 m/s
Transit mid-time (BJD)
2,459,040.8396
Angular separation (arcsec)
0.10800
Eq. Temperature
1,689K
(1416 °C)
Insolation (S⊕)
1,360.00
Earth = 1.00
Earth Similarity (ESI)
0.068
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
Yee et al. 2025Instrument
TESS CCD Array
Publication
2025-07
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-2346
Spectral Class
F-type yellow-white
Effective Temperature
6,480 K — hotter than the Sun (5,778 K)
Estimated Age
1.90 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.380 R☉
Stellar Mass
1.271 M☉
Metallicity [Fe/H]
-0.03
Extended Stellar Properties
Surface gravity (log g)
4.265 dex
Stellar density
0.689 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.257 mas
Total Proper Motion
11.643 mas/yr
PM Right Ascension
-11.23 mas/yr
PM Declination
3.06 mas/yr
Galactic Cartesian (pc)
x = 0.032 · y = 0.972 · z = -0.231
Equatorial (J2000)
RA 88.09291° · Dec -13.37247°
Galactic ℓ, b
218.564° · -19.035°
Ecliptic λ, β
87.679° · -36.796°
HTM-20 index
-62470033
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