Key parameters at a glance
- A radius of 2.39 Earth radii
- A mass of 6.30 Earth masses
- Surface gravity around 1.10 g
- An orbital period of 1.762 days
- Equilibrium temperature 1,324 K (1051 °C)
- Distance from Earth 376.55 light-years
- Earth Similarity Index 0.186
- Travel time at Voyager 1 speed 6,640,408 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around TOI-1346
TOI-1346 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| TOI-1346 b this | Sub-Neptune | 2.39 | 6.30 | 1.762 | 1,324 | 2025 |
| TOI-1346 c | Sub-Neptune | 2.23 | 5.60 | 5.503 | 928 | 2025 |
TOI-1346 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1343of 1978
top 67.8%
This planet
2.39R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | TOI-1346 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.39 | 11.21 |
| Mass (M⊕) | 1.00 | 6.30 | 317.83 |
| Density (g/cm³) | 5.51 | 2.54 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.10 | 2.53 |
| Insolation (S⊕) | 1.00 | 468.54 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 219852882
Gaia DR2
Gaia DR2 1636979235288735744
Gaia DR3
Gaia DR3 1636979235288735744
System
TOI-1346
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.76 Earth days (0.5% of a terrestrial year).
Transit Fingerprint
Depth
0.073 %
Duration
0.878 h
Impact parameter b
0.926
Rp / R★
0.028040
Transit midpoint (BJD)
2,459,978.0239
Photometric dip
Transit produces a flux drop of 734 ppm lasting ≈ 0.88 h.
Extended Orbital Architecture
Planet / star radius ratio
0.028040
Semi-major axis / stellar radius
7.420
Impact parameter (b)
0.926
Transit mid-time (BJD)
2,459,978.0239
Eq. Temperature
1,324K
(1051 °C)
Insolation (S⊕)
468.54
Earth = 1.00
Earth Similarity (ESI)
0.186
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Gomez Barrientos et al. 2025Instrument
TESS CCD Array
Publication
2025-08
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1346
Spectral Class
K-type orange
Effective Temperature
5,099 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.780 R☉
Stellar Mass
0.820 M☉
Metallicity [Fe/H]
-0.01
Extended Stellar Properties
Surface gravity (log g)
4.610 dex
Stellar density
2.395 g/cm³
Metallicity ratio
[m/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
8.633 mas
Total Proper Motion
92.110 mas/yr
PM Right Ascension
-20.12 mas/yr
PM Declination
89.89 mas/yr
Galactic Cartesian (pc)
x = -0.084 · y = -0.351 · z = 0.933
Equatorial (J2000)
RA 256.62268° · Dec 68.84330°
Galactic ℓ, b
99.784° · 34.559°
Ecliptic λ, β
149.687° · 84.449°
HTM-20 index
-866643324
Similar Worlds
Kepler-152 c
Sub-Neptune · K-type orange
Radius 2.39 R⊕ · 1,438.6 ly
TOI-1184 b
Sub-Neptune · K-type orange
Radius 2.39 R⊕ · 191.1 ly
HD 73583 c
Sub-Neptune · K-type orange
Radius 2.39 R⊕ · 103.0 ly
HD 110067 c
Sub-Neptune · K-type orange
Radius 2.39 R⊕ · 104.9 ly
Kepler-1849 b
Sub-Neptune · K-type orange
Radius 2.39 R⊕ · 2,060.9 ly
HIP 113103 c
Sub-Neptune · K-type orange
Radius 2.40 R⊕ · 150.7 ly