Key parameters at a glance
- A radius of 12.18 Earth radii
- A mass of 1,379.38 Earth masses
- Surface gravity around 9.29 g
- An orbital period of 16.249 days
- Semi-major axis 0.1291 AU
- Equilibrium temperature 806 K (532 °C)
- Distance from Earth 305.72 light-years
- Earth Similarity Index 0.221
- Travel time at Voyager 1 speed 5,391,384 years
TIC 393818343 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1439of 1771
top 81.2%
This planet
12.18R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TIC 393818343 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.18 | 11.21 |
| Mass (M⊕) | 1.00 | 1,379.38 | 317.83 |
| Density (g/cm³) | 5.51 | 4.22 | 1.33 |
| Surface Gravity (g) | 1.00 | 9.29 | 2.53 |
| Insolation (S⊕) | 1.00 | 2.28 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,379.375 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 393818343
Gaia DR2
Gaia DR2 4233021433662981760
Gaia DR3
Gaia DR3 4233021433662981760
System
TIC 393818343
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 16.25 Earth days (4.4% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.1291 AU.
Transit Fingerprint
Depth
1.060 %
Duration
4.151 h
Impact parameter b
0.119
Rp / R★
0.102950
Transit midpoint (BJD)
2,459,811.2402
Photometric dip
Transit produces a flux drop of 10,600 ppm lasting ≈ 4.15 h.
Extended Orbital Architecture
Planet / star radius ratio
0.102950
Semi-major axis / stellar radius
25.600
Impact parameter (b)
0.119
RV semi-amplitude (K)
414.800 m/s
Transit mid-time (BJD)
2,459,811.2402
Long. of periastron (ω)
1.69°
Angular separation (arcsec)
1.38000
Eq. Temperature
806K
(532 °C)
Insolation (S⊕)
2.28
Earth = 1.00
Earth Similarity (ESI)
0.221
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
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
Sgro et al. 2024Instrument
TESS CCD Array
Publication
2024-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TIC 393818343
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,756 K — cooler than the Sun (5,778 K)
Estimated Age
3.80 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.086 R☉
Stellar Mass
1.082 M☉
Metallicity [Fe/H]
0.32
Extended Stellar Properties
Surface gravity (log g)
4.402 dex
Stellar density
1.198 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
10.640 mas
Total Proper Motion
105.467 mas/yr
PM Right Ascension
-56.71 mas/yr
PM Declination
-88.92 mas/yr
Galactic Cartesian (pc)
x = 0.645 · y = -0.761 · z = 0.063
Equatorial (J2000)
RA 310.29170° · Dec 3.63830°
Galactic ℓ, b
49.655° · -22.349°
Ecliptic λ, β
313.789° · 21.163°
HTM-20 index
1377874339
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