Key parameters at a glance
- A radius of 15.08 Earth radii
- A mass of 270.15 Earth masses
- Surface gravity around 1.19 g
- An orbital period of 4.939 days
- Semi-major axis 0.0628 AU
- Equilibrium temperature 1,566 K (1293 °C)
- Distance from Earth 1,737.20 light-years
- Earth Similarity Index 0.073
- Travel time at Voyager 1 speed 30,635,546 years
TOI-5340 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#228of 1771
top 12.8%
This planet
15.08R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-5340 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 15.08 | 11.21 |
| Mass (M⊕) | 1.00 | 270.15 | 317.83 |
| Density (g/cm³) | 5.51 | 0.43 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.19 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,004.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 270.154 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 14156936
Gaia DR2
Gaia DR2 65315118156520320
Gaia DR3
Gaia DR3 65315118156520320
System
TOI-5340
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.94 Earth days (1.4% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0628 AU.
Transit Fingerprint
Depth
0.563 %
Duration
4.980 h
Impact parameter b
0.487
Transit midpoint (BJD)
2,459,712.5791
Photometric dip
Transit produces a flux drop of 5,630 ppm lasting ≈ 4.98 h.
Extended Orbital Architecture
Semi-major axis / stellar radius
7.300
Impact parameter (b)
0.487
RV semi-amplitude (K)
84.000 m/s
Transit mid-time (BJD)
2,459,712.5791
Angular separation (arcsec)
0.11800
Eq. Temperature
1,566K
(1293 °C)
Insolation (S⊕)
1,004.00
Earth = 1.00
Earth Similarity (ESI)
0.073
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-5340
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,990 K — hotter than the Sun (5,778 K)
Estimated Age
3.50 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.842 R☉
Stellar Mass
1.350 M☉
Metallicity [Fe/H]
0.21
Extended Stellar Properties
Surface gravity (log g)
4.036 dex
Stellar density
0.302 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
1.849 mas
Total Proper Motion
15.121 mas/yr
PM Right Ascension
10.23 mas/yr
PM Declination
-11.14 mas/yr
Galactic Cartesian (pc)
x = 0.472 · y = 0.795 · z = 0.381
Equatorial (J2000)
RA 59.30948° · Dec 22.37834°
Galactic ℓ, b
169.732° · -23.167°
Ecliptic λ, β
61.818° · 1.891°
HTM-20 index
-219077919
Similar Worlds
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