Key parameters at a glance
- A radius of 11.31 Earth radii
- A mass of 419.53 Earth masses
- Surface gravity around 3.28 g
- An orbital period of 75.124 days
- Semi-major axis 0.3320 AU
- Equilibrium temperature 441 K (168 °C)
- Distance from Earth 1,137.79 light-years
- Earth Similarity Index 0.360
- Travel time at Voyager 1 speed 20,064,960 years
TOI-5542 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1617of 1771
top 91.2%
This planet
11.31R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-5542 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 11.31 | 11.21 |
| Mass (M⊕) | 1.00 | 419.53 | 317.83 |
| Density (g/cm³) | 5.51 | 1.60 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.28 | 2.53 |
| Insolation (S⊕) | 1.00 | 9.60 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 419.534 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 466206508
Gaia DR2
Gaia DR2 6443054270942726144
Gaia DR3
Gaia DR3 6443054270942726144
System
TOI-5542
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 75.12 Earth days (20.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3320 AU.
Transit Fingerprint
Depth
1.117 %
Duration
8.599 h
Impact parameter b
0.419
Rp / R★
0.098000
Transit midpoint (BJD)
2,458,679.3476
Photometric dip
Transit produces a flux drop of 11,171 ppm lasting ≈ 8.60 h.
Extended Orbital Architecture
Planet / star radius ratio
0.098000
Impact parameter (b)
0.419
RV semi-amplitude (K)
69.170 m/s
Transit mid-time (BJD)
2,458,679.3476
Long. of periastron (ω)
125.60°
Angular separation (arcsec)
0.95200
Eq. Temperature
441K
(168 °C)
Insolation (S⊕)
9.60
Earth = 1.00
Earth Similarity (ESI)
0.360
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
Grieves et al. 2022Instrument
TESS CCD Array
Publication
2022-09
Observation locale
Space
Discovery cohort
Planets confirmed in 2022 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-5542
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,700 K — cooler than the Sun (5,778 K)
Estimated Age
10.80 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.058 R☉
Stellar Mass
0.890 M☉
Metallicity [Fe/H]
-0.21
Extended Stellar Properties
Surface gravity (log g)
4.200 dex
Stellar density
1.030 g/cm³
Rotational v·sin i
3.03 km/s
Activity index (log R'HK)
-5.280
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.838 mas
Total Proper Motion
6.848 mas/yr
PM Right Ascension
-6.14 mas/yr
PM Declination
-3.02 mas/yr
Galactic Cartesian (pc)
x = 0.261 · y = -0.406 · z = -0.876
Equatorial (J2000)
RA 302.79842° · Dec -61.13547°
Galactic ℓ, b
335.725° · -33.083°
Ecliptic λ, β
289.940° · -39.948°
HTM-20 index
-801896825
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