Key parameters at a glance
- A radius of 3.71 Earth radii
- A mass of 13.30 Earth masses
- Surface gravity around 0.97 g
- An orbital period of 2.321 days
- Semi-major axis 0.0287 AU
- Equilibrium temperature 872 K (599 °C)
- Distance from Earth 600.52 light-years
- Earth Similarity Index 0.246
- Travel time at Voyager 1 speed 10,590,142 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-7009 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#85of 1978
top 4.2%
This planet
3.71R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | TOI-7009 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.71 | 11.21 |
| Mass (M⊕) | 1.00 | 13.30 | 317.83 |
| Density (g/cm³) | 5.51 | 1.43 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.97 | 2.53 |
| Insolation (S⊕) | 1.00 | 42.41 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 405837291
Gaia DR2
Gaia DR2 2233920659406441856
Gaia DR3
Gaia DR3 2233920659406441856
System
TOI-7009
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.32 Earth days (0.6% of a terrestrial year) at a mean orbital distance of 0.0287 AU.
Transit Fingerprint
Depth
0.294 %
Duration
1.227 h
Impact parameter b
0.744
Rp / R★
0.060300
Transit midpoint (BJD)
2,460,392.3627
Photometric dip
Transit produces a flux drop of 2,935 ppm lasting ≈ 1.23 h.
Extended Orbital Architecture
Planet / star radius ratio
0.060300
Semi-major axis / stellar radius
10.950
Impact parameter (b)
0.744
Transit mid-time (BJD)
2,460,392.3627
Angular separation (arcsec)
0.15600
Eq. Temperature
872K
(599 °C)
Insolation (S⊕)
42.41
Earth = 1.00
Earth Similarity (ESI)
0.246
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.
Discovery Paper
Primary reference
Morello et al. 2026Instrument
TESS CCD Array
Publication
2026-01
Observation locale
Space
Discovery cohort
Planets confirmed in 2026 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-7009
Spectral Class
K-type orange
Effective Temperature
4,080 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.564 R☉
Stellar Mass
0.583 M☉
Metallicity [Fe/H]
-0.11
Extended Stellar Properties
Surface gravity (log g)
4.630 dex
Stellar density
4.610 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
5.402 mas
Total Proper Motion
36.552 mas/yr
PM Right Ascension
-36.06 mas/yr
PM Declination
5.95 mas/yr
Galactic Cartesian (pc)
x = 0.278 · y = -0.491 · z = 0.826
Equatorial (J2000)
RA 299.51313° · Dec 55.65103°
Galactic ℓ, b
89.166° · 13.448°
Ecliptic λ, β
336.283° · 72.327°
HTM-20 index
1876951527
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