Key parameters at a glance
- A radius of 12.98 Earth radii
- A mass of 721.47 Earth masses
- Surface gravity around 4.28 g
- An orbital period of 2.018 days
- Semi-major axis 0.0314 AU
- Equilibrium temperature 1,488 K (1215 °C)
- Distance from Earth 708.39 light-years
- Earth Similarity Index 0.102
- Travel time at Voyager 1 speed 12,492,422 years
TOI-3331 A b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1008of 1771
top 56.9%
This planet
12.98R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-3331 A b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.98 | 11.21 |
| Mass (M⊕) | 1.00 | 721.47 | 317.83 |
| Density (g/cm³) | 5.51 | 1.82 | 1.33 |
| Surface Gravity (g) | 1.00 | 4.28 | 2.53 |
| Insolation (S⊕) | 1.00 | 818.50 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 721.470 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 194795551
Gaia DR2
Gaia DR2 4042548116644168832
Gaia DR3
Gaia DR3 4042548116644168832
System
TOI-3331
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.02 Earth days (0.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0314 AU.
Transit Fingerprint
Depth
1.559 %
Duration
2.123 h
Impact parameter b
0.569
Transit midpoint (BJD)
2,459,371.6530
Photometric dip
Transit produces a flux drop of 15,590 ppm lasting ≈ 2.12 h.
Extended Orbital Architecture
Semi-major axis / stellar radius
7.090
Impact parameter (b)
0.569
RV semi-amplitude (K)
360.000 m/s
Transit mid-time (BJD)
2,459,371.6530
Angular separation (arcsec)
0.14500
Eq. Temperature
1,488K
(1215 °C)
Insolation (S⊕)
818.50
Earth = 1.00
Earth Similarity (ESI)
0.102
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
Yee et al. 2022Instrument
TESS CCD Array
Publication
2022-08
Observation locale
Space
Discovery cohort
Planets confirmed in 2022 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-3331 A
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,609 K — cooler than the Sun (5,778 K)
Estimated Age
2.10 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.952 R☉
Stellar Mass
1.016 M☉
Metallicity [Fe/H]
0.15
Extended Stellar Properties
Surface gravity (log g)
4.487 dex
Stellar density
1.650 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
4.577 mas
Total Proper Motion
16.948 mas/yr
PM Right Ascension
0.42 mas/yr
PM Declination
-16.94 mas/yr
Galactic Cartesian (pc)
x = 0.019 · y = -0.828 · z = -0.561
Equatorial (J2000)
RA 271.32417° · Dec -34.10717°
Galactic ℓ, b
357.625° · -6.219°
Ecliptic λ, β
271.112° · -10.673°
HTM-20 index
195729795
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