Key parameters at a glance
- A radius of 14.67 Earth radii
- A mass of 193.88 Earth masses
- Surface gravity around 0.90 g
- An orbital period of 3.880 days
- Semi-major axis 0.0502 AU
- Equilibrium temperature 1,451 K (1178 °C)
- Distance from Earth 1,370.26 light-years
- Earth Similarity Index 0.077
- Travel time at Voyager 1 speed 24,164,470 years
TOI-3474 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#265of 1771
top 14.9%
This planet
14.67R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-3474 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 14.67 | 11.21 |
| Mass (M⊕) | 1.00 | 193.88 | 317.83 |
| Density (g/cm³) | 5.51 | 0.34 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.90 | 2.53 |
| Insolation (S⊕) | 1.00 | 740.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 193.875 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 274367763
Gaia DR2
Gaia DR2 5986650013613194624
Gaia DR3
Gaia DR3 5986650013613194624
System
TOI-3474
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.88 Earth days (1.1% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0502 AU.
Transit Fingerprint
Depth
1.148 %
Duration
3.799 h
Impact parameter b
0.100
Transit midpoint (BJD)
2,459,789.2887
Photometric dip
Transit produces a flux drop of 11,480 ppm lasting ≈ 3.80 h.
Extended Orbital Architecture
Semi-major axis / stellar radius
8.620
Impact parameter (b)
0.100
RV semi-amplitude (K)
73.000 m/s
Transit mid-time (BJD)
2,459,789.2887
Angular separation (arcsec)
0.11900
Eq. Temperature
1,451K
(1178 °C)
Insolation (S⊕)
740.00
Earth = 1.00
Earth Similarity (ESI)
0.077
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-3474
Spectral Class
F-type yellow-white
Effective Temperature
6,020 K — hotter than the Sun (5,778 K)
Estimated Age
4.70 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.256 R☉
Stellar Mass
1.121 M☉
Metallicity [Fe/H]
0.15
Extended Stellar Properties
Surface gravity (log g)
4.292 dex
Stellar density
0.804 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.352 mas
Total Proper Motion
8.847 mas/yr
PM Right Ascension
-8.54 mas/yr
PM Declination
-2.30 mas/yr
Galactic Cartesian (pc)
x = -0.398 · y = -0.538 · z = -0.743
Equatorial (J2000)
RA 233.50335° · Dec -47.96366°
Galactic ℓ, b
328.971° · 6.518°
Ecliptic λ, β
243.222° · -27.860°
HTM-20 index
1243943824
Similar Worlds
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Radius 14.57 R⊕ · 4,562.4 ly