Key parameters at a glance
- A radius of 12.51 Earth radii
- A mass of 329.59 Earth masses
- Surface gravity around 2.11 g
- An orbital period of 8.215 days
- Semi-major axis 0.0896 AU
- Equilibrium temperature 1,364 K (1091 °C)
- Distance from Earth 1,146.40 light-years
- Earth Similarity Index 0.103
- Travel time at Voyager 1 speed 20,216,691 years
TOI-2169 A b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1234of 1771
top 69.6%
This planet
12.51R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-2169 A b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.51 | 11.21 |
| Mass (M⊕) | 1.00 | 329.59 | 317.83 |
| Density (g/cm³) | 5.51 | 0.92 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.11 | 2.53 |
| Insolation (S⊕) | 1.00 | 577.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 329.588 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 8516795
Gaia DR2
Gaia DR2 4535299582687857920
Gaia DR3
Gaia DR3 4535299582687857920
System
TOI-2169
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.21 Earth days (2.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0896 AU.
Transit Fingerprint
Depth
0.397 %
Duration
4.337 h
Impact parameter b
0.775
Transit midpoint (BJD)
2,459,732.6738
Photometric dip
Transit produces a flux drop of 3,970 ppm lasting ≈ 4.34 h.
Extended Orbital Architecture
Semi-major axis / stellar radius
10.570
Impact parameter (b)
0.775
RV semi-amplitude (K)
82.500 m/s
Transit mid-time (BJD)
2,459,732.6738
Angular separation (arcsec)
0.25500
Eq. Temperature
1,364K
(1091 °C)
Insolation (S⊕)
577.00
Earth = 1.00
Earth Similarity (ESI)
0.103
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
Yee et al. 2025Instrument
TESS CCD Array
Publication
2025-07
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-2169 A
Spectral Class
F-type yellow-white
Effective Temperature
6,270 K — hotter than the Sun (5,778 K)
Estimated Age
2.51 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.820 R☉
Stellar Mass
1.420 M☉
Metallicity [Fe/H]
0.12
Extended Stellar Properties
Surface gravity (log g)
4.069 dex
Stellar density
0.331 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.817 mas
Total Proper Motion
31.402 mas/yr
PM Right Ascension
5.41 mas/yr
PM Declination
-30.93 mas/yr
Galactic Cartesian (pc)
x = 0.146 · y = -0.907 · z = 0.395
Equatorial (J2000)
RA 279.17011° · Dec 23.25862°
Galactic ℓ, b
52.422° · 13.455°
Ecliptic λ, β
282.233° · 46.309°
HTM-20 index
1858765673
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