Key parameters at a glance
- A radius of 11.60 Earth radii
- A mass of 343.00 Earth masses
- Surface gravity around 2.55 g
- An orbital period of 1.631 days
- Semi-major axis 0.0199 AU
- Equilibrium temperature 737 K (464 °C)
- Distance from Earth 281.96 light-years
- Earth Similarity Index 0.214
- Travel time at Voyager 1 speed 4,972,357 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-5205 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1577of 1771
top 89.0%
This planet
11.60R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-5205 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 11.60 | 11.21 |
| Mass (M⊕) | 1.00 | 343.00 | 317.83 |
| Density (g/cm³) | 5.51 | 1.21 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.55 | 2.53 |
| Insolation (S⊕) | 1.00 | 49.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 343.000 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 419411415
Gaia DR2
Gaia DR2 1842656663520849024
Gaia DR3
Gaia DR3 1842656663520849024
System
TOI-5205
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.63 Earth days (0.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0199 AU.
Transit Fingerprint
Depth
6.805 %
Duration
1.400 h
Impact parameter b
0.402
Rp / R★
0.272000
Transit midpoint (BJD)
2,459,443.4718
Photometric dip
Transit produces a flux drop of 68,050 ppm lasting ≈ 1.40 h.
Extended Orbital Architecture
Planet / star radius ratio
0.272000
Semi-major axis / stellar radius
10.940
Impact parameter (b)
0.402
RV semi-amplitude (K)
346.000 m/s
Transit mid-time (BJD)
2,459,443.4718
Long. of periastron (ω)
-42.00°
Angular separation (arcsec)
0.23000
Eq. Temperature
737K
(464 °C)
Insolation (S⊕)
49.00
Earth = 1.00
Earth Similarity (ESI)
0.214
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. 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
Kanodia et al. 2023Instrument
TESS CCD Array
Publication
2023-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-5205
Spectral Class
M-type red dwarf
Effective Temperature
3,430 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.394 R☉
Stellar Mass
0.392 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.840 dex
Stellar density
9.000 g/cm³
Systemic radial velocity
-65.90 km/s
Rotational v·sin i
2.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
11.539 mas
Total Proper Motion
66.825 mas/yr
PM Right Ascension
41.77 mas/yr
PM Declination
52.16 mas/yr
Galactic Cartesian (pc)
x = 0.630 · y = -0.658 · z = 0.412
Equatorial (J2000)
RA 313.77068° · Dec 24.36098°
Galactic ℓ, b
69.534° · -13.203°
Ecliptic λ, β
325.106° · 39.800°
HTM-20 index
176918157
Similar Worlds
TOI-519 b
Gas Giant · M-type red dwarf
Radius 11.55 R⊕ · 376.9 ly
HATS-71 b
Gas Giant · M-type red dwarf
Radius 11.48 R⊕ · 457.4 ly
KMT-2016-BLG-1337L b
Gas Giant · M-type red dwarf
Radius 11.40 R⊕ · 22,570.0 ly
TOI-3235 b
Gas Giant · M-type red dwarf
Radius 11.40 R⊕ · 237.5 ly
TOI-5916 b
Gas Giant · M-type red dwarf
Radius 11.35 R⊕ · 651.4 ly
TOI-3714 b
Gas Giant · M-type red dwarf
Radius 11.32 R⊕ · 367.6 ly