Key parameters at a glance
- A radius of 11.88 Earth radii
- A mass of 2,011.86 Earth masses
- Surface gravity around 14.25 g
- An orbital period of 3.410 days
- Semi-major axis 0.0486 AU
- Equilibrium temperature 1,586 K (1313 °C)
- Distance from Earth 582.78 light-years
- Earth Similarity Index 0.103
- Travel time at Voyager 1 speed 10,277,246 years
TOI-628 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1547of 1771
top 87.3%
This planet
11.88R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-628 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 11.88 | 11.21 |
| Mass (M⊕) | 1.00 | 2,011.86 | 317.83 |
| Density (g/cm³) | 5.51 | 6.58 | 1.33 |
| Surface Gravity (g) | 1.00 | 14.25 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,052.90 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 2,011.864 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HD
HD 288842
TIC
TIC 281408474
Gaia DR2
Gaia DR2 3126717023051258112
Gaia DR3
Gaia DR3 3126717023056016256
System
TOI-628
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.41 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0486 AU.
Transit Fingerprint
Depth
0.657 %
Duration
3.782 h
Impact parameter b
0.230
Rp / R★
0.081080
Transit midpoint (BJD)
2,458,629.4797
Photometric dip
Transit produces a flux drop of 6,570 ppm lasting ≈ 3.78 h.
Extended Orbital Architecture
Planet / star radius ratio
0.081080
Semi-major axis / stellar radius
7.780
Impact parameter (b)
0.230
RV semi-amplitude (K)
713.000 m/s
Transit mid-time (BJD)
2,458,629.4797
Long. of periastron (ω)
-74.00°
Angular separation (arcsec)
0.27200
Eq. Temperature
1,586K
(1313 °C)
Insolation (S⊕)
1,052.90
Earth = 1.00
Earth Similarity (ESI)
0.103
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
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
Rodriguez et al. 2021Instrument
TESS CCD Array
Publication
2021-04
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-628
Spectral Class
F-type yellow-white
Effective Temperature
6,250 K — hotter than the Sun (5,778 K)
Estimated Age
1.28 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.345 R☉
Stellar Mass
1.311 M☉
Metallicity [Fe/H]
0.26
Extended Stellar Properties
Surface gravity (log g)
4.300 dex
Stellar density
0.762 g/cm³
Systemic radial velocity
20.07 km/s
Rotational v·sin i
6.90 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
5.570 mas
Total Proper Motion
1.798 mas/yr
PM Right Ascension
-1.44 mas/yr
PM Declination
-1.08 mas/yr
Galactic Cartesian (pc)
x = -0.161 · y = 0.986 · z = 0.031
Equatorial (J2000)
RA 99.26306° · Dec 1.76755°
Galactic ℓ, b
209.717° · -2.392°
Ecliptic λ, β
99.944° · -21.352°
HTM-20 index
455381948
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