Key parameters at a glance
- A radius of 10.89 Earth radii
- A mass of 3,179.00 Earth masses
- Surface gravity around 26.81 g
- An orbital period of 6.850 days
- Semi-major axis 0.0576 AU
- Equilibrium temperature 495 K (222 °C)
- Distance from Earth 453.49 light-years
- Earth Similarity Index 0.297
- Travel time at Voyager 1 speed 7,997,363 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-6330 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1679of 1771
top 94.7%
This planet
10.89R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-6330 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 10.89 | 11.21 |
| Mass (M⊕) | 1.00 | 3,179.00 | 317.83 |
| Density (g/cm³) | 5.51 | 13.57 | 1.33 |
| Surface Gravity (g) | 1.00 | 26.81 | 2.53 |
| Insolation (S⊕) | 1.00 | 9.97 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 3,179.000 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 308120029
Gaia DR2
Gaia DR2 407530931116600320
Gaia DR3
Gaia DR3 407530931116600320
System
TOI-6330
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 6.85 Earth days (1.9% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.0576 AU.
Transit Fingerprint
Depth
3.313 %
Duration
2.230 h
Impact parameter b
0.520
Rp / R★
0.206000
Transit midpoint (BJD)
2,459,901.3611
Photometric dip
Transit produces a flux drop of 33,133 ppm lasting ≈ 2.23 h.
Extended Orbital Architecture
Planet / star radius ratio
0.206000
Semi-major axis / stellar radius
25.550
Impact parameter (b)
0.520
RV semi-amplitude (K)
1,710.000 m/s
Transit mid-time (BJD)
2,459,901.3611
Long. of periastron (ω)
37.00°
Angular separation (arcsec)
0.41400
Eq. Temperature
495K
(222 °C)
Insolation (S⊕)
9.97
Earth = 1.00
Earth Similarity (ESI)
0.297
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
Hotnisky 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-6330
Spectral Class
M-type red dwarf
Effective Temperature
3,539 K — cooler than the Sun (5,778 K)
Estimated Age
7.60 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.490 R☉
Stellar Mass
0.531 M☉
Metallicity [Fe/H]
0.08
Extended Stellar Properties
Surface gravity (log g)
4.770 dex
Stellar density
6.020 g/cm³
Rotational v·sin i
2.00 km/s
Rotation period
36.00 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
7.164 mas
Total Proper Motion
57.480 mas/yr
PM Right Ascension
-35.67 mas/yr
PM Declination
-45.07 mas/yr
Galactic Cartesian (pc)
x = 0.548 · y = 0.223 · z = 0.806
Equatorial (J2000)
RA 22.16798° · Dec 53.68608°
Galactic ℓ, b
128.494° · -8.783°
Ecliptic λ, β
43.775° · 40.572°
HTM-20 index
906312245
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