Key parameters at a glance
- A radius of 15.22 Earth radii
- A mass of 1,687.67 Earth masses
- Surface gravity around 7.28 g
- An orbital period of 1.745 days
- Semi-major axis 0.0322 AU
- Equilibrium temperature 2,255 K (1982 °C)
- Distance from Earth 1,607.58 light-years
- Earth Similarity Index 0.061
- Travel time at Voyager 1 speed 28,349,738 years
TOI-4773 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#219of 1771
top 12.3%
This planet
15.22R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-4773 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 15.22 | 11.21 |
| Mass (M⊕) | 1.00 | 1,687.67 | 317.83 |
| Density (g/cm³) | 5.51 | 2.63 | 1.33 |
| Surface Gravity (g) | 1.00 | 7.28 | 2.53 |
| Insolation (S⊕) | 1.00 | 3,879.81 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,687.669 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 415276070
Gaia DR2
Gaia DR2 5715145275211633792
Gaia DR3
Gaia DR3 5715145275211633792
System
TOI-4773
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.75 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0322 AU.
Transit Fingerprint
Depth
0.751 %
Duration
1.961 h
Impact parameter b
0.886
Rp / R★
0.090100
Transit midpoint (BJD)
2,459,673.5400
Photometric dip
Transit produces a flux drop of 7,510 ppm lasting ≈ 1.96 h.
Extended Orbital Architecture
Planet / star radius ratio
0.090100
Semi-major axis / stellar radius
4.460
Impact parameter (b)
0.886
RV semi-amplitude (K)
684.000 m/s
Transit mid-time (BJD)
2,459,673.5400
Long. of periastron (ω)
-113.00°
Angular separation (arcsec)
0.06520
Eq. Temperature
2,255K
(1982 °C)
Insolation (S⊕)
3,879.81
Earth = 1.00
Earth Similarity (ESI)
0.061
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
Schulte et al. 2025Instrument
TESS CCD Array
Publication
2025-09
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-4773
Spectral Class
F-type yellow-white
Effective Temperature
6,740 K — hotter than the Sun (5,778 K)
Estimated Age
1.07 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.550 R☉
Stellar Mass
1.452 M☉
Metallicity [Fe/H]
0.11
Extended Stellar Properties
Surface gravity (log g)
4.220 dex
Stellar density
0.550 g/cm³
Rotational v·sin i
15.30 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.001 mas
Total Proper Motion
8.076 mas/yr
PM Right Ascension
-7.90 mas/yr
PM Declination
-1.66 mas/yr
Galactic Cartesian (pc)
x = -0.392 · y = 0.844 · z = -0.366
Equatorial (J2000)
RA 114.94265° · Dec -21.48562°
Galactic ℓ, b
237.439° · 0.363°
Ecliptic λ, β
121.979° · -42.195°
HTM-20 index
-280493079
Similar Worlds
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Kepler-76 b
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TOI-3894 b
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