Key parameters at a glance
- A radius of 16.70 Earth radii
- A mass of 991.62 Earth masses
- Surface gravity around 3.56 g
- An orbital period of 2.650 days
- Semi-major axis 0.0460 AU
- Equilibrium temperature 2,370 K (2097 °C)
- Distance from Earth 485.73 light-years
- Earth Similarity Index 0.051
- Travel time at Voyager 1 speed 8,565,810 years
TOI-1431 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#122of 1771
top 6.8%
This planet
16.70R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-1431 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 16.70 | 11.21 |
| Mass (M⊕) | 1.00 | 991.62 | 317.83 |
| Density (g/cm³) | 5.51 | 1.17 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.56 | 2.53 |
| Insolation (S⊕) | 1.00 | 5,300.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 991.625 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
HD
HD 201033
TIC
TIC 375506058
Gaia DR2
Gaia DR2 2188906825165621120
Gaia DR3
Gaia DR3 2188906825165621120
System
TOI-1431
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.65 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0460 AU.
Transit Fingerprint
Depth
0.580 %
Duration
2.489 h
Impact parameter b
0.881
Rp / R★
0.079550
Transit midpoint (BJD)
2,458,739.1774
Photometric dip
Transit produces a flux drop of 5,797 ppm lasting ≈ 2.49 h.
Extended Orbital Architecture
Planet / star radius ratio
0.079550
Semi-major axis / stellar radius
5.150
Impact parameter (b)
0.881
RV semi-amplitude (K)
294.100 m/s
Occultation depth
0.013 ppm
Transit mid-time (BJD)
2,458,739.1774
Long. of periastron (ω)
108.00°
Angular separation (arcsec)
0.30900
Eq. Temperature
2,370K
(2097 °C)
Insolation (S⊕)
5,300.00
Earth = 1.00
Earth Similarity (ESI)
0.051
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
Addison et al. 2021Instrument
TESS CCD Array
Publication
2021-12
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1431
Spectral Class
A-type white
Effective Temperature
7,690 K — hotter than the Sun (5,778 K)
Estimated Age
0.29 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.920 R☉
Stellar Mass
1.900 M☉
Metallicity [Fe/H]
0.09
Extended Stellar Properties
Surface gravity (log g)
4.150 dex
Stellar density
0.370 g/cm³
Rotational v·sin i
6.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
6.686 mas
Total Proper Motion
26.599 mas/yr
PM Right Ascension
11.74 mas/yr
PM Declination
23.87 mas/yr
Galactic Cartesian (pc)
x = 0.408 · y = -0.391 · z = 0.825
Equatorial (J2000)
RA 316.20369° · Dec 55.58802°
Galactic ℓ, b
94.607° · 5.723°
Ecliptic λ, β
355.693° · 65.853°
HTM-20 index
105259292
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