Key parameters at a glance
- A radius of 15.10 Earth radii
- A mass of 1,595.50 Earth masses
- Surface gravity around 7.00 g
- An orbital period of 0.672 days
- Semi-major axis 0.0179 AU
- Equilibrium temperature 3,646 K (3373 °C)
- Distance from Earth 854.66 light-years
- Earth Similarity Index 0.033
- Travel time at Voyager 1 speed 15,071,971 years
TOI-2109 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#227of 1771
top 12.8%
This planet
15.10R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-2109 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 15.10 | 11.21 |
| Mass (M⊕) | 1.00 | 1,595.50 | 317.83 |
| Density (g/cm³) | 5.51 | 2.55 | 1.33 |
| Surface Gravity (g) | 1.00 | 7.00 | 2.53 |
| Insolation (S⊕) | 1.00 | 14,429.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,595.499 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 392476080
Gaia DR2
Gaia DR2 4558177980120149632
Gaia DR3
Gaia DR3 4558177980124887936
System
TOI-2109
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts roughly 16.1 hours long at a mean orbital distance of 0.0179 AU.
Transit Fingerprint
Depth
0.665 %
Duration
1.801 h
Impact parameter b
0.748
Rp / R★
0.081550
Transit midpoint (BJD)
2,459,378.4594
Photometric dip
Transit produces a flux drop of 6,651 ppm lasting ≈ 1.80 h.
Extended Orbital Architecture
Planet / star radius ratio
0.081550
Semi-major axis / stellar radius
2.268
Impact parameter (b)
0.748
RV semi-amplitude (K)
860.000 m/s
Transit mid-time (BJD)
2,459,378.4594
Angular separation (arcsec)
0.06830
Eq. Temperature
3,646K
(3373 °C)
Insolation (S⊕)
14,429.00
Earth = 1.00
Earth Similarity (ESI)
0.033
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
Wong et al. 2021Instrument
TESS CCD Array
Publication
2021-12
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-2109
Spectral Class
F-type yellow-white
Effective Temperature
6,540 K — hotter than the Sun (5,778 K)
Estimated Age
1.77 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.698 R☉
Stellar Mass
1.453 M☉
Metallicity [Fe/H]
0.07
Extended Stellar Properties
Surface gravity (log g)
4.139 dex
Stellar density
0.417 g/cm³
Rotational v·sin i
81.20 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
3.788 mas
Total Proper Motion
12.533 mas/yr
PM Right Ascension
-8.45 mas/yr
PM Declination
-9.26 mas/yr
Galactic Cartesian (pc)
x = -0.277 · y = -0.917 · z = 0.285
Equatorial (J2000)
RA 253.18630° · Dec 16.57992°
Galactic ℓ, b
35.518° · 33.531°
Ecliptic λ, β
249.155° · 38.810°
HTM-20 index
-725212994
Similar Worlds
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