Key parameters at a glance
- A radius of 11.10 Earth radii
- A mass of 486.28 Earth masses
- Surface gravity around 3.95 g
- An orbital period of 10.331 days
- Semi-major axis 0.0970 AU
- Equilibrium temperature 1,370 K (1097 °C)
- Distance from Earth 585.01 light-years
- Earth Similarity Index 0.118
- Travel time at Voyager 1 speed 10,316,703 years
TOI-481 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1654of 1771
top 93.3%
This planet
11.10R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-481 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 11.10 | 11.21 |
| Mass (M⊕) | 1.00 | 486.28 | 317.83 |
| Density (g/cm³) | 5.51 | 1.96 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.95 | 2.53 |
| Insolation (S⊕) | 1.00 | 253.13 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 486.280 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 339672028
Gaia DR2
Gaia DR2 5486322710592888064
Gaia DR3
Gaia DR3 5486322710592888064
System
TOI-481
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 10.33 Earth days (2.8% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0970 AU.
Transit Fingerprint
Depth
0.458 %
Duration
5.626 h
Impact parameter b
0.150
Rp / R★
0.061400
Transit midpoint (BJD)
2,458,511.6418
Photometric dip
Transit produces a flux drop of 4,577 ppm lasting ≈ 5.63 h.
Extended Orbital Architecture
Planet / star radius ratio
0.061400
Semi-major axis / stellar radius
12.520
Impact parameter (b)
0.150
RV semi-amplitude (K)
130.300 m/s
Transit mid-time (BJD)
2,458,511.6418
Long. of periastron (ω)
64.80°
Angular separation (arcsec)
0.54100
Eq. Temperature
1,370K
(1097 °C)
Insolation (S⊕)
253.13
Earth = 1.00
Earth Similarity (ESI)
0.118
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
Brahm et al. 2020Instrument
TESS CCD Array
Publication
2020-11
Observation locale
Space
Discovery cohort
Planets confirmed in 2020 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-481
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,735 K — cooler than the Sun (5,778 K)
Estimated Age
6.70 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.660 R☉
Stellar Mass
1.140 M☉
Metallicity [Fe/H]
0.26
Extended Stellar Properties
Surface gravity (log g)
4.060 dex
Stellar density
0.360 g/cm³
Systemic radial velocity
38.19 km/s
Rotational v·sin i
4.54 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
5.547 mas
Total Proper Motion
36.107 mas/yr
PM Right Ascension
25.68 mas/yr
PM Declination
-25.39 mas/yr
Galactic Cartesian (pc)
x = -0.189 · y = 0.505 · z = -0.842
Equatorial (J2000)
RA 110.51269° · Dec -57.38500°
Galactic ℓ, b
268.608° · -18.675°
Ecliptic λ, β
145.848° · -76.808°
HTM-20 index
-2057357557
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