Key parameters at a glance
- A radius of 10.42 Earth radii
- A mass of 2,955.80 Earth masses
- Surface gravity around 27.20 g
- An orbital period of 13.337 days
- Semi-major axis 0.1120 AU
- Equilibrium temperature 860 K (587 °C)
- Distance from Earth 1,659.11 light-years
- Earth Similarity Index 0.173
- Travel time at Voyager 1 speed 29,258,402 years
TOI-2373 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1735of 1771
top 97.9%
This planet
10.42R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-2373 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 10.42 | 11.21 |
| Mass (M⊕) | 1.00 | 2,955.80 | 317.83 |
| Density (g/cm³) | 5.51 | 14.40 | 1.33 |
| Surface Gravity (g) | 1.00 | 27.20 | 2.53 |
| Insolation (S⊕) | 1.00 | 69.87 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 2,955.804 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 332558858
Gaia DR2
Gaia DR2 5097529733950580736
Gaia DR3
Gaia DR3 5097529733950580736
System
TOI-2373
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 13.34 Earth days (3.7% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.1120 AU.
Transit Fingerprint
Depth
0.821 %
Duration
4.384 h
Rp / R★
0.086700
Transit midpoint (BJD)
2,458,448.3260
Photometric dip
Transit produces a flux drop of 8,210 ppm lasting ≈ 4.38 h.
Extended Orbital Architecture
Planet / star radius ratio
0.086700
Semi-major axis / stellar radius
23.100
RV semi-amplitude (K)
784.000 m/s
Transit mid-time (BJD)
2,458,448.3260
Long. of periastron (ω)
15.00°
Angular separation (arcsec)
0.22000
Eq. Temperature
860K
(587 °C)
Insolation (S⊕)
69.87
Earth = 1.00
Earth Similarity (ESI)
0.173
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
Eberhardt et al. 2023Instrument
TESS CCD Array
Publication
2023-12
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-2373
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,651 K — cooler than the Sun (5,778 K)
Estimated Age
5.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.102 R☉
Stellar Mass
1.041 M☉
Metallicity [Fe/H]
0.30
Extended Stellar Properties
Surface gravity (log g)
4.371 dex
Stellar density
1.096 g/cm³
Rotational v·sin i
2.70 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
1.937 mas
Total Proper Motion
40.769 mas/yr
PM Right Ascension
11.29 mas/yr
PM Declination
-39.18 mas/yr
Galactic Cartesian (pc)
x = 0.454 · y = 0.843 · z = -0.288
Equatorial (J2000)
RA 61.68622° · Dec -16.75575°
Galactic ℓ, b
210.480° · -43.828°
Ecliptic λ, β
55.412° · -36.857°
HTM-20 index
-1003957700
Similar Worlds
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