Key parameters at a glance
- A radius of 10.98 Earth radii
- A mass of 235.19 Earth masses
- Surface gravity around 1.95 g
- An orbital period of 18.184 days
- Semi-major axis 0.1340 AU
- Equilibrium temperature 833 K (560 °C)
- Distance from Earth 1,045.42 light-years
- Earth Similarity Index 0.185
- Travel time at Voyager 1 speed 18,435,946 years
TOI-6628 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1666of 1771
top 94.0%
This planet
10.98R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-6628 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 10.98 | 11.21 |
| Mass (M⊕) | 1.00 | 235.19 | 317.83 |
| Density (g/cm³) | 5.51 | 0.98 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.95 | 2.53 |
| Insolation (S⊕) | 1.00 | 20.09 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 235.193 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 75650448
Gaia DR2
Gaia DR2 6200734415129509504
Gaia DR3
Gaia DR3 6200734415129509504
System
TOI-6628
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 18.18 Earth days (5.0% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.1340 AU.
Transit Fingerprint
Depth
0.934 %
Duration
3.696 h
Impact parameter b
0.811
Rp / R★
0.100000
Transit midpoint (BJD)
2,458,602.7210
Photometric dip
Transit produces a flux drop of 9,343 ppm lasting ≈ 3.70 h.
Extended Orbital Architecture
Planet / star radius ratio
0.100000
Impact parameter (b)
0.811
RV semi-amplitude (K)
78.910 m/s
Transit mid-time (BJD)
2,458,602.7210
Long. of periastron (ω)
215.80°
Angular separation (arcsec)
0.41800
Eq. Temperature
833K
(560 °C)
Insolation (S⊕)
20.09
Earth = 1.00
Earth Similarity (ESI)
0.185
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
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
Tala Pinto et al. 2025Instrument
TESS CCD Array
Publication
2025-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-6628
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,463 K — cooler than the Sun (5,778 K)
Estimated Age
7.50 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.010 R☉
Stellar Mass
0.970 M☉
Metallicity [Fe/H]
0.36
Extended Stellar Properties
Surface gravity (log g)
4.416 dex
Stellar density
1.326 g/cm³
Rotational v·sin i
3.13 km/s
Activity index (log R'HK)
-4.998
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
3.093 mas
Total Proper Motion
34.133 mas/yr
PM Right Ascension
-30.18 mas/yr
PM Declination
-15.95 mas/yr
Galactic Cartesian (pc)
x = -0.569 · y = -0.586 · z = -0.577
Equatorial (J2000)
RA 225.83705° · Dec -35.23058°
Galactic ℓ, b
331.228° · 20.292°
Ecliptic λ, β
233.425° · -17.228°
HTM-20 index
-93570275
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