Key parameters at a glance
- A radius of 13.05 Earth radii
- A mass of 232.01 Earth masses
- Surface gravity around 1.36 g
- An orbital period of 3.177 days
- Semi-major axis 0.0447 AU
- Equilibrium temperature 1,458 K (1185 °C)
- Distance from Earth 983.93 light-years
- Earth Similarity Index 0.087
- Travel time at Voyager 1 speed 17,351,682 years
TOI-4087 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#955of 1771
top 53.9%
This planet
13.05R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-4087 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.05 | 11.21 |
| Mass (M⊕) | 1.00 | 232.01 | 317.83 |
| Density (g/cm³) | 5.51 | 0.57 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.36 | 2.53 |
| Insolation (S⊕) | 1.00 | 753.90 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 232.015 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 310002617
Gaia DR2
Gaia DR2 1725490333641502976
Gaia DR3
Gaia DR3 1725490333641502976
System
TOI-4087
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.18 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0447 AU.
Transit Fingerprint
Depth
1.157 %
Duration
2.984 h
Impact parameter b
0.328
Transit midpoint (BJD)
2,459,244.5664
Photometric dip
Transit produces a flux drop of 11,565 ppm lasting ≈ 2.98 h.
Extended Orbital Architecture
Semi-major axis / stellar radius
8.630
Impact parameter (b)
0.328
RV semi-amplitude (K)
90.000 m/s
Transit mid-time (BJD)
2,459,244.5664
Angular separation (arcsec)
0.14800
Eq. Temperature
1,458K
(1185 °C)
Insolation (S⊕)
753.90
Earth = 1.00
Earth Similarity (ESI)
0.087
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. 2023Instrument
TESS CCD Array
Publication
2023-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-4087
Spectral Class
F-type yellow-white
Effective Temperature
6,060 K — hotter than the Sun (5,778 K)
Estimated Age
0.80 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.112 R☉
Stellar Mass
1.178 M☉
Metallicity [Fe/H]
0.24
Extended Stellar Properties
Surface gravity (log g)
4.416 dex
Stellar density
1.205 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
3.286 mas
Total Proper Motion
19.685 mas/yr
PM Right Ascension
-16.73 mas/yr
PM Declination
10.38 mas/yr
Galactic Cartesian (pc)
x = -0.091 · y = -0.071 · z = 0.993
Equatorial (J2000)
RA 217.92578° · Dec 83.37271°
Galactic ℓ, b
119.586° · 33.091°
Ecliptic λ, β
105.417° · 69.979°
HTM-20 index
633887310
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