Key parameters at a glance
- A radius of 9.29 Earth radii
- A mass of 96.62 Earth masses
- Surface gravity around 1.12 g
- An orbital period of 3.278 days
- Semi-major axis 0.0449 AU
- Equilibrium temperature 1,622 K (1349 °C)
- Distance from Earth 1,836.74 light-years
- Earth Similarity Index 0.086
- Travel time at Voyager 1 speed 32,390,983 years
TOI-2986 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#62of 574
top 10.6%
This planet
9.29R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | TOI-2986 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 9.29 | 11.21 |
| Mass (M⊕) | 1.00 | 96.62 | 317.83 |
| Density (g/cm³) | 5.51 | 0.66 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.12 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,156.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 96.620 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 148497855
Gaia DR2
Gaia DR2 3764588660860363264
Gaia DR3
Gaia DR3 3764588660860363264
System
TOI-2986
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.28 Earth days (0.9% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0449 AU.
Transit Fingerprint
Depth
0.342 %
Duration
3.958 h
Impact parameter b
0.140
Transit midpoint (BJD)
2,459,537.6255
Photometric dip
Transit produces a flux drop of 3,415 ppm lasting ≈ 3.96 h.
Extended Orbital Architecture
Semi-major axis / stellar radius
6.650
Impact parameter (b)
0.140
RV semi-amplitude (K)
38.000 m/s
Transit mid-time (BJD)
2,459,537.6255
Angular separation (arcsec)
0.07970
Eq. Temperature
1,622K
(1349 °C)
Insolation (S⊕)
1,156.00
Earth = 1.00
Earth Similarity (ESI)
0.086
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. 2025Instrument
TESS CCD Array
Publication
2025-07
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-2986
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,906 K — hotter than the Sun (5,778 K)
Estimated Age
6.30 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.458 R☉
Stellar Mass
1.122 M☉
Metallicity [Fe/H]
0.10
Extended Stellar Properties
Surface gravity (log g)
4.165 dex
Stellar density
0.517 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
1.749 mas
Total Proper Motion
13.776 mas/yr
PM Right Ascension
-12.94 mas/yr
PM Declination
-4.73 mas/yr
Galactic Cartesian (pc)
x = -0.954 · y = 0.278 · z = -0.113
Equatorial (J2000)
RA 163.77156° · Dec -6.47845°
Galactic ℓ, b
258.710° · 46.164°
Ecliptic λ, β
167.589° · -12.355°
HTM-20 index
-2036829866
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HD 24040 c
Neptune-like · G-type yellow (Sun-like)
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