Key parameters at a glance
- A radius of 14.46 Earth radii
- A mass of 187.52 Earth masses
- Surface gravity around 0.90 g
- An orbital period of 3.609 days
- Semi-major axis 0.0494 AU
- Equilibrium temperature 1,621 K (1348 °C)
- Distance from Earth 1,587.47 light-years
- Earth Similarity Index 0.063
- Travel time at Voyager 1 speed 27,995,027 years
TOI-3980 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#283of 1771
top 15.9%
This planet
14.46R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-3980 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 14.46 | 11.21 |
| Mass (M⊕) | 1.00 | 187.52 | 317.83 |
| Density (g/cm³) | 5.51 | 0.25 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.90 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,153.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 187.519 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 312548829
Gaia DR2
Gaia DR2 426758571995216768
Gaia DR3
Gaia DR3 426758571995216768
System
TOI-3980
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.61 Earth days (1.0% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0494 AU.
Transit Fingerprint
Depth
0.670 %
Duration
2.359 h
Impact parameter b
0.928
Transit midpoint (BJD)
2,459,528.8950
Photometric dip
Transit produces a flux drop of 6,700 ppm lasting ≈ 2.36 h.
Extended Orbital Architecture
Semi-major axis / stellar radius
6.520
Impact parameter (b)
0.928
RV semi-amplitude (K)
67.000 m/s
Transit mid-time (BJD)
2,459,528.8950
Angular separation (arcsec)
0.10100
Eq. Temperature
1,621K
(1348 °C)
Insolation (S⊕)
1,153.00
Earth = 1.00
Earth Similarity (ESI)
0.063
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-3980
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,840 K — hotter than the Sun (5,778 K)
Estimated Age
4.70 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.626 R☉
Stellar Mass
1.240 M☉
Metallicity [Fe/H]
0.19
Extended Stellar Properties
Surface gravity (log g)
4.106 dex
Stellar density
0.403 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.026 mas
Total Proper Motion
17.420 mas/yr
PM Right Ascension
17.16 mas/yr
PM Declination
3.01 mas/yr
Galactic Cartesian (pc)
x = 0.494 · y = 0.113 · z = 0.862
Equatorial (J2000)
RA 12.84194° · Dec 59.57586°
Galactic ℓ, b
122.923° · -3.296°
Ecliptic λ, β
42.106° · 48.277°
HTM-20 index
-1888582976
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