Key parameters at a glance
- A radius of 10.74 Earth radii
- A mass of 80.80 Earth masses
- Surface gravity around 0.70 g
- An orbital period of 8.835 days
- Semi-major axis 0.0770 AU
- Equilibrium temperature 854 K (581 °C)
- Distance from Earth 519.38 light-years
- Earth Similarity Index 0.153
- Travel time at Voyager 1 speed 9,159,334 years
- Almost certainly tidally locked to its host star given the close orbit
IRAS 04125+2902 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1703of 1771
top 96.1%
This planet
10.74R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | IRAS 04125+2902 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 10.74 | 11.21 |
| Mass (M⊕) | 1.00 | 80.80 | 317.83 |
| Density (g/cm³) | 5.51 | 0.36 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.70 | 2.53 |
| Insolation (S⊕) | 1.00 | 41.42 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 56658270
Gaia DR2
Gaia DR2 164800235906366976
Gaia DR3
Gaia DR3 164800235906366976
System
TOI-6963
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.83 Earth days (2.4% of a terrestrial year) at a mean orbital distance of 0.0770 AU.
Transit Fingerprint
Depth
0.613 %
Duration
5.995 h
Impact parameter b
0.340
Rp / R★
0.067900
Transit midpoint (BJD)
2,458,821.8251
Photometric dip
Transit produces a flux drop of 6,132 ppm lasting ≈ 6.00 h.
Extended Orbital Architecture
Planet / star radius ratio
0.067900
Semi-major axis / stellar radius
11.420
Impact parameter (b)
0.340
Transit mid-time (BJD)
2,458,821.8251
Angular separation (arcsec)
0.48400
Eq. Temperature
854K
(581 °C)
Insolation (S⊕)
41.42
Earth = 1.00
Earth Similarity (ESI)
0.153
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.
Discovery Paper
Primary reference
Barber et al. 2024Instrument
TESS CCD Array
Publication
2024-11
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: IRAS 04125+2902
Spectral Class
K-type orange
Effective Temperature
4,080 K — cooler than the Sun (5,778 K)
Estimated Age
0.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.450 R☉
Stellar Mass
0.700 M☉
Metallicity [Fe/H]
—
Extended Stellar Properties
Surface gravity (log g)
3.847 dex
Stellar density
0.361 g/cm³
Rotational v·sin i
7.10 km/s
Rotation period
11.31 days
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
6.252 mas
Total Proper Motion
21.619 mas/yr
PM Right Ascension
12.34 mas/yr
PM Declination
-17.75 mas/yr
Galactic Cartesian (pc)
x = 0.384 · y = 0.784 · z = 0.487
Equatorial (J2000)
RA 63.92834° · Dec 29.16654°
Galactic ℓ, b
167.736° · -15.434°
Ecliptic λ, β
67.208° · 7.767°
HTM-20 index
-87264233
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WASP-154 b
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