Key parameters at a glance
- A radius of 13.40 Earth radii
- A mass of 638.00 Earth masses
- Surface gravity around 3.55 g
- An orbital period of 3.602 days
- Semi-major axis 0.0480 AU
- Equilibrium temperature 1,358 K (1085 °C)
- Distance from Earth 1,721.42 light-years
- Earth Similarity Index 0.109
- Travel time at Voyager 1 speed 30,357,160 years
TOI-2981 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#730of 1771
top 41.2%
This planet
13.40R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-2981 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.40 | 11.21 |
| Mass (M⊕) | 1.00 | 638.00 | 317.83 |
| Density (g/cm³) | 5.51 | 1.46 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.55 | 2.53 |
| Insolation (S⊕) | 1.00 | 556.62 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 638.000 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 287145649
Gaia DR2
Gaia DR2 5458258092906639232
Gaia DR3
Gaia DR3 5458258092906639232
System
TOI-2981
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.60 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0480 AU.
Transit Fingerprint
Depth
1.363 %
Duration
3.070 h
Impact parameter b
0.340
Rp / R★
0.114000
Transit midpoint (BJD)
2,459,302.7195
Photometric dip
Transit produces a flux drop of 13,630 ppm lasting ≈ 3.07 h.
Extended Orbital Architecture
Planet / star radius ratio
0.114000
Semi-major axis / stellar radius
9.510
Impact parameter (b)
0.340
RV semi-amplitude (K)
260.600 m/s
Transit mid-time (BJD)
2,459,302.7195
Long. of periastron (ω)
28.00°
Angular separation (arcsec)
0.09090
Eq. Temperature
1,358K
(1085 °C)
Insolation (S⊕)
556.62
Earth = 1.00
Earth Similarity (ESI)
0.109
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
Mantovan et al. 2024Instrument
TESS CCD Array
Publication
2024-09
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-2981
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,940 K — hotter than the Sun (5,778 K)
Estimated Age
4.50 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.080 R☉
Stellar Mass
1.030 M☉
Metallicity [Fe/H]
-0.11
Extended Stellar Properties
Surface gravity (log g)
4.280 dex
Stellar density
1.255 g/cm³
Systemic radial velocity
9.31 km/s
Rotational v·sin i
3.40 km/s
Rotation period
18.30 days
Activity index (log R'HK)
-5.090
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
1.866 mas
Total Proper Motion
19.270 mas/yr
PM Right Ascension
-7.23 mas/yr
PM Declination
17.86 mas/yr
Galactic Cartesian (pc)
x = -0.865 · y = 0.256 · z = -0.431
Equatorial (J2000)
RA 163.48739° · Dec -25.52460°
Galactic ℓ, b
272.118° · 30.225°
Ecliptic λ, β
175.771° · -29.826°
HTM-20 index
-186946323
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