Key parameters at a glance
- A radius of 12.34 Earth radii
- A mass of 572.09 Earth masses
- Surface gravity around 3.76 g
- An orbital period of 7.479 days
- Semi-major axis 0.0726 AU
- Equilibrium temperature 919 K (646 °C)
- Distance from Earth 694.95 light-years
- Earth Similarity Index 0.175
- Travel time at Voyager 1 speed 12,255,449 years
TOI-4961 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1339of 1771
top 75.6%
This planet
12.34R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-4961 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.34 | 11.21 |
| Mass (M⊕) | 1.00 | 572.09 | 317.83 |
| Density (g/cm³) | 5.51 | 1.67 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.76 | 2.53 |
| Insolation (S⊕) | 1.00 | 115.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 572.091 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 420202798
Gaia DR2
Gaia DR2 6056675572727076736
Gaia DR3
Gaia DR3 6056675572727076736
System
TOI-4961
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 7.48 Earth days (2.0% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0726 AU.
Transit Fingerprint
Depth
1.541 %
Duration
3.528 h
Impact parameter b
0.639
Transit midpoint (BJD)
2,459,884.8208
Photometric dip
Transit produces a flux drop of 15,410 ppm lasting ≈ 3.53 h.
Extended Orbital Architecture
Semi-major axis / stellar radius
17.150
Impact parameter (b)
0.639
RV semi-amplitude (K)
202.000 m/s
Transit mid-time (BJD)
2,459,884.8208
Long. of periastron (ω)
-126.00°
Angular separation (arcsec)
0.34100
Eq. Temperature
919K
(646 °C)
Insolation (S⊕)
115.00
Earth = 1.00
Earth Similarity (ESI)
0.175
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
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-4961
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,380 K — cooler than the Sun (5,778 K)
Estimated Age
8.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.912 R☉
Stellar Mass
0.912 M☉
Metallicity [Fe/H]
0.21
Extended Stellar Properties
Surface gravity (log g)
4.479 dex
Stellar density
1.700 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
4.665 mas
Total Proper Motion
18.240 mas/yr
PM Right Ascension
2.97 mas/yr
PM Declination
-18.00 mas/yr
Galactic Cartesian (pc)
x = -0.490 · y = -0.109 · z = -0.865
Equatorial (J2000)
RA 192.50186° · Dec -59.89193°
Galactic ℓ, b
302.752° · 2.979°
Ecliptic λ, β
222.175° · -48.634°
HTM-20 index
1130559911
Similar Worlds
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Gas Giant · G-type yellow (Sun-like)
Radius 12.33 R⊕ · 6,311.2 ly
WASP-41 b
Gas Giant · G-type yellow (Sun-like)
Radius 12.33 R⊕ · 532.8 ly
WASP-44 b
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NGTS-15 b
Gas Giant · G-type yellow (Sun-like)
Radius 12.33 R⊕ · 2,565.2 ly
Kepler-30 c
Gas Giant · G-type yellow (Sun-like)
Radius 12.30 R⊕ · 2,981.8 ly
HAT-P-13 c
Gas Giant · G-type yellow (Sun-like)
Radius 12.30 R⊕ · 805.0 ly