Key parameters at a glance
- A radius of 12.29 Earth radii
- A mass of 731.01 Earth masses
- Surface gravity around 4.84 g
- An orbital period of 56.399 days
- Semi-major axis 0.3081 AU
- Equilibrium temperature 605 K (332 °C)
- Distance from Earth 1,042.50 light-years
- Earth Similarity Index 0.275
- Travel time at Voyager 1 speed 18,384,468 years
TOI-4127 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1391of 1771
top 78.5%
This planet
12.29R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-4127 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.29 | 11.21 |
| Mass (M⊕) | 1.00 | 731.01 | 317.83 |
| Density (g/cm³) | 5.51 | 2.17 | 1.33 |
| Surface Gravity (g) | 1.00 | 4.84 | 2.53 |
| Insolation (S⊕) | 1.00 | 22.30 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 731.005 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 141488193
Gaia DR2
Gaia DR2 1111639314047794944
Gaia DR3
Gaia DR3 1111639314047794944
System
TOI-4127
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 56.40 Earth days (15.4% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.3081 AU.
Transit Fingerprint
Depth
0.746 %
Duration
4.069 h
Impact parameter b
0.170
Transit midpoint (BJD)
2,458,862.7282
Photometric dip
Transit produces a flux drop of 7,460 ppm lasting ≈ 4.07 h.
Extended Orbital Architecture
Impact parameter (b)
0.170
RV semi-amplitude (K)
160.100 m/s
Transit mid-time (BJD)
2,458,862.7282
Long. of periastron (ω)
129.60°
Angular separation (arcsec)
0.96400
Eq. Temperature
605K
(332 °C)
Insolation (S⊕)
22.30
Earth = 1.00
Earth Similarity (ESI)
0.275
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
Gupta et al. 2023Instrument
TESS CCD Array
Publication
2023-06
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-4127
Spectral Class
F-type yellow-white
Effective Temperature
6,096 K — hotter than the Sun (5,778 K)
Estimated Age
4.80 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.293 R☉
Stellar Mass
1.230 M☉
Metallicity [Fe/H]
0.14
Extended Stellar Properties
Surface gravity (log g)
4.260 dex
Stellar density
0.775 g/cm³
Rotational v·sin i
7.70 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
3.100 mas
Total Proper Motion
4.632 mas/yr
PM Right Ascension
3.35 mas/yr
PM Declination
-3.20 mas/yr
Galactic Cartesian (pc)
x = -0.080 · y = 0.291 · z = 0.953
Equatorial (J2000)
RA 105.40455° · Dec 72.41493°
Galactic ℓ, b
142.647° · 26.527°
Ecliptic λ, β
97.073° · 49.354°
HTM-20 index
-2000127640
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