Key parameters at a glance
- A radius of 10.57 Earth radii
- A mass of 99.16 Earth masses
- Surface gravity around 0.89 g
- An orbital period of 2.218 days
- Semi-major axis 0.0314 AU
- Equilibrium temperature 1,190 K (917 °C)
- Distance from Earth 504.61 light-years
- Earth Similarity Index 0.112
- Travel time at Voyager 1 speed 8,898,837 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-3486 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1720of 1771
top 97.1%
This planet
10.57R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-3486 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 10.57 | 11.21 |
| Mass (M⊕) | 1.00 | 99.16 | 317.83 |
| Density (g/cm³) | 5.51 | 0.46 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.89 | 2.53 |
| Insolation (S⊕) | 1.00 | 334.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 99.162 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 221861843
Gaia DR2
Gaia DR2 5927041953543630592
Gaia DR3
Gaia DR3 5927041953543630592
System
TOI-3486
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.22 Earth days (0.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0314 AU.
Transit Fingerprint
Depth
1.515 %
Duration
1.717 h
Impact parameter b
0.718
Transit midpoint (BJD)
2,459,797.2422
Photometric dip
Transit produces a flux drop of 15,150 ppm lasting ≈ 1.72 h.
Extended Orbital Architecture
Semi-major axis / stellar radius
8.570
Impact parameter (b)
0.718
RV semi-amplitude (K)
54.500 m/s
Transit mid-time (BJD)
2,459,797.2422
Angular separation (arcsec)
0.20300
Eq. Temperature
1,190K
(917 °C)
Insolation (S⊕)
334.00
Earth = 1.00
Earth Similarity (ESI)
0.112
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.
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-3486
Spectral Class
K-type orange
Effective Temperature
4,930 K — cooler than the Sun (5,778 K)
Estimated Age
5.80 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.788 R☉
Stellar Mass
0.837 M☉
Metallicity [Fe/H]
0.28
Extended Stellar Properties
Surface gravity (log g)
4.569 dex
Stellar density
2.420 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
6.435 mas
Total Proper Motion
77.607 mas/yr
PM Right Ascension
-25.27 mas/yr
PM Declination
-73.38 mas/yr
Galactic Cartesian (pc)
x = -0.179 · y = -0.478 · z = -0.860
Equatorial (J2000)
RA 249.44320° · Dec -59.30511°
Galactic ℓ, b
328.427° · -8.158°
Ecliptic λ, β
257.063° · -36.785°
HTM-20 index
-1423214308
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