Key parameters at a glance
- A radius of 2.30 Earth radii
- A mass of 13.00 Earth masses
- Surface gravity around 2.47 g
- An orbital period of 2.680 days
- Semi-major axis 0.0376 AU
- Equilibrium temperature 1,285 K (1012 °C)
- Distance from Earth 362.93 light-years
- Earth Similarity Index 0.207
- Travel time at Voyager 1 speed 6,400,329 years
1 sibling around TOI-1669
TOI-1669 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| TOI-1669 c this | Sub-Neptune | 2.30 | 13.00 | 2.680 | 1,285 | 2024 |
| TOI-1669 b | Gas Giant | 14.10 | 191.00 | 500.000 | — | 2023 |
TOI-1669 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1516of 1978
top 76.6%
This planet
2.30R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | TOI-1669 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.30 | 11.21 |
| Mass (M⊕) | 1.00 | 13.00 | 317.83 |
| Density (g/cm³) | 5.51 | 6.00 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.47 | 2.53 |
| Insolation (S⊕) | 1.00 | 343.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 13.000 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 428679607
Gaia DR2
Gaia DR2 569673024645542528
Gaia DR3
Gaia DR3 569673024645542528
System
TOI-1669
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.68 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0376 AU.
Transit Fingerprint
Depth
0.046 %
Duration
1.928 h
Impact parameter b
0.560
Rp / R★
0.019934
Transit midpoint (BJD)
2,458,816.9448
Photometric dip
Transit produces a flux drop of 456 ppm lasting ≈ 1.93 h.
Extended Orbital Architecture
Planet / star radius ratio
0.019934
Impact parameter (b)
0.560
Transit mid-time (BJD)
2,458,816.9448
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
0.33800
Eq. Temperature
1,285K
(1012 °C)
Insolation (S⊕)
343.00
Earth = 1.00
Earth Similarity (ESI)
0.207
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
Discovery Paper
Primary reference
Polanski et al. 2024Instrument
TESS CCD Array
Publication
2024-06
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1669
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,497 K — cooler than the Sun (5,778 K)
Estimated Age
7.70 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.056 R☉
Stellar Mass
0.987 M☉
Metallicity [Fe/H]
0.27
Extended Stellar Properties
Surface gravity (log g)
4.382 dex
Stellar density
1.169 g/cm³
Rotational v·sin i
0.60 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
8.958 mas
Total Proper Motion
97.981 mas/yr
PM Right Ascension
91.73 mas/yr
PM Declination
-34.43 mas/yr
Galactic Cartesian (pc)
x = 0.078 · y = 0.080 · z = 0.994
Equatorial (J2000)
RA 45.95647° · Dec 83.58743°
Galactic ℓ, b
126.696° · 21.707°
Ecliptic λ, β
80.595° · 61.619°
HTM-20 index
850322700
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