Key parameters at a glance
- A radius of 2.77 Earth radii
- A mass of 9.10 Earth masses
- Surface gravity around 1.19 g
- An orbital period of 1.824 days
- Semi-major axis 0.0264 AU
- Equilibrium temperature 941 K (668 °C)
- Distance from Earth 251.97 light-years
- Earth Similarity Index 0.260
- Travel time at Voyager 1 speed 4,443,546 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around TOI-969
TOI-969 b 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-969 b this | Sub-Neptune | 2.77 | 9.10 | 1.824 | 941 | 2022 |
| TOI-969 c | Gas Giant | 12.40 | 3,591.46 | 1,700.000 | 96 | 2022 |
TOI-969 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#790of 1978
top 39.9%
This planet
2.77R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | TOI-969 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.77 | 11.21 |
| Mass (M⊕) | 1.00 | 9.10 | 317.83 |
| Density (g/cm³) | 5.51 | 2.34 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.19 | 2.53 |
| Insolation (S⊕) | 1.00 | 188.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 9.100 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 280437559
Gaia DR2
Gaia DR2 3087206553745290624
Gaia DR3
Gaia DR3 3087206553745290624
System
TOI-969
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.82 Earth days (0.5% of a terrestrial year) at a mean orbital distance of 0.0264 AU.
Transit Fingerprint
Depth
0.144 %
Duration
1.519 h
Impact parameter b
0.480
Transit midpoint (BJD)
2,459,248.3771
Photometric dip
Transit produces a flux drop of 1,435 ppm lasting ≈ 1.52 h.
Extended Orbital Architecture
Semi-major axis / stellar radius
8.470
Impact parameter (b)
0.480
Transit mid-time (BJD)
2,459,248.3771
Angular separation (arcsec)
0.34100
Eq. Temperature
941K
(668 °C)
Insolation (S⊕)
188.00
Earth = 1.00
Earth Similarity (ESI)
0.260
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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
Lillo Box et al. 2022Instrument
TESS CCD Array
Publication
2022-10
Observation locale
Space
Discovery cohort
Planets confirmed in 2022 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-969
Spectral Class
K-type orange
Effective Temperature
4,435 K — cooler than the Sun (5,778 K)
Estimated Age
2.03 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.671 R☉
Stellar Mass
0.734 M☉
Metallicity [Fe/H]
0.18
Extended Stellar Properties
Surface gravity (log g)
4.550 dex
Stellar density
1.664 g/cm³
Systemic radial velocity
-5.79 km/s
Activity index (log R'HK)
-4.381
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
12.916 mas
Total Proper Motion
85.091 mas/yr
PM Right Ascension
-34.15 mas/yr
PM Declination
-77.94 mas/yr
Galactic Cartesian (pc)
x = -0.424 · y = 0.905 · z = 0.037
Equatorial (J2000)
RA 115.13669° · Dec 2.09859°
Galactic ℓ, b
216.700° · 11.877°
Ecliptic λ, β
116.680° · -19.042°
HTM-20 index
-891115527
Similar Worlds
TOI-1260 c
Sub-Neptune · K-type orange
Radius 2.76 R⊕ · 240.0 ly
TOI-444 b
Sub-Neptune · K-type orange
Radius 2.77 R⊕ · 187.2 ly
K2-123 b
Sub-Neptune · K-type orange
Radius 2.76 R⊕ · 526.9 ly
Kepler-305 d
Sub-Neptune · K-type orange
Radius 2.76 R⊕ · 2,832.6 ly
Kepler-1140 b
Sub-Neptune · K-type orange
Radius 2.77 R⊕ · 2,141.1 ly
TOI-125 c
Sub-Neptune · K-type orange
Radius 2.76 R⊕ · 362.2 ly