Key parameters at a glance
- A radius of 8.34 Earth radii
- A mass of 79.77 Earth masses
- Surface gravity around 1.15 g
- An orbital period of 3.472 days
- Semi-major axis 0.0342 AU
- Equilibrium temperature 555 K (282 °C)
- Distance from Earth 321.09 light-years
- Earth Similarity Index 0.285
- Travel time at Voyager 1 speed 5,662,367 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-762 A b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#135of 574
top 23.3%
This planet
8.34R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | TOI-762 A b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 8.34 | 11.21 |
| Mass (M⊕) | 1.00 | 79.77 | 317.83 |
| Density (g/cm³) | 5.51 | 0.76 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.15 | 2.53 |
| Insolation (S⊕) | 1.00 | 17.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 79.775 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 178709444
Gaia DR2
Gaia DR2 5362352744504000256
Gaia DR3
Gaia DR3 5362352744504000256
System
TOI-762
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.47 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0342 AU.
Transit Fingerprint
Depth
3.062 %
Duration
1.389 h
Impact parameter b
0.756
Rp / R★
0.179850
Transit midpoint (BJD)
2,459,850.2585
Photometric dip
Transit produces a flux drop of 30,625 ppm lasting ≈ 1.39 h.
Extended Orbital Architecture
Planet / star radius ratio
0.179850
Semi-major axis / stellar radius
17.290
Impact parameter (b)
0.756
RV semi-amplitude (K)
58.100 m/s
Transit mid-time (BJD)
2,459,850.2585
Angular separation (arcsec)
0.34700
Eq. Temperature
555K
(282 °C)
Insolation (S⊕)
17.00
Earth = 1.00
Earth Similarity (ESI)
0.285
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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
Hartman et al. 2024Instrument
TESS CCD Array
Publication
2024-07
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-762 A
Spectral Class
M-type red dwarf
Effective Temperature
3,266 K — cooler than the Sun (5,778 K)
Estimated Age
9.30 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.425 R☉
Stellar Mass
0.442 M☉
Metallicity [Fe/H]
0.36
Extended Stellar Properties
Surface gravity (log g)
4.827 dex
Stellar density
8.110 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
10.129 mas
Total Proper Motion
161.034 mas/yr
PM Right Ascension
-159.16 mas/yr
PM Declination
-24.51 mas/yr
Galactic Cartesian (pc)
x = -0.652 · y = 0.162 · z = -0.741
Equatorial (J2000)
RA 166.07474° · Dec -47.82150°
Galactic ℓ, b
284.961° · 11.277°
Ecliptic λ, β
192.667° · -48.089°
HTM-20 index
-911123683
Similar Worlds
TOI-3629 b
Neptune-like · M-type red dwarf
Radius 8.29 R⊕ · 424.3 ly
TOI-4860 b
Neptune-like · M-type red dwarf
Radius 8.70 R⊕ · 261.4 ly
HIP 38594 c
Neptune-like · M-type red dwarf
Radius 7.94 R⊕ · 58.0 ly
TOI-3984 A b
Neptune-like · M-type red dwarf
Radius 7.90 R⊕ · 355.1 ly
TOI-530 b
Neptune-like · M-type red dwarf
Radius 9.30 R⊕ · 485.2 ly
KMT-2025-BLG-1616L b
Neptune-like · M-type red dwarf
Radius 7.34 R⊕ · 24,461.7 ly