Key parameters at a glance
- A radius of 10.76 Earth radii
- A mass of 642.01 Earth masses
- Surface gravity around 5.54 g
- An orbital period of 10.244 days
- Semi-major axis 0.0930 AU
- Equilibrium temperature 1,056 K (783 °C)
- Distance from Earth 666.76 light-years
- Earth Similarity Index 0.167
- Travel time at Voyager 1 speed 11,758,267 years
TOI-5027 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1696of 1771
top 95.7%
This planet
10.76R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-5027 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 10.76 | 11.21 |
| Mass (M⊕) | 1.00 | 642.01 | 317.83 |
| Density (g/cm³) | 5.51 | 2.94 | 1.33 |
| Surface Gravity (g) | 1.00 | 5.54 | 2.53 |
| Insolation (S⊕) | 1.00 | 190.91 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 642.013 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 361711730
Gaia DR2
Gaia DR2 5820908638718592256
Gaia DR3
Gaia DR3 5820908638718592256
System
TOI-5027
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 10.24 Earth days (2.8% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.0930 AU.
Transit Fingerprint
Depth
0.941 %
Duration
2.999 h
Impact parameter b
0.921
Rp / R★
0.106000
Transit midpoint (BJD)
2,458,649.4577
Photometric dip
Transit produces a flux drop of 9,410 ppm lasting ≈ 3.00 h.
Extended Orbital Architecture
Planet / star radius ratio
0.106000
Impact parameter (b)
0.921
RV semi-amplitude (K)
201.610 m/s
Transit mid-time (BJD)
2,458,649.4577
Long. of periastron (ω)
288.60°
Angular separation (arcsec)
0.45500
Eq. Temperature
1,056K
(783 °C)
Insolation (S⊕)
190.91
Earth = 1.00
Earth Similarity (ESI)
0.167
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
Tala Pinto et al. 2025Instrument
TESS CCD Array
Publication
2025-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-5027
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,909 K — hotter than the Sun (5,778 K)
Estimated Age
0.40 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.920 R☉
Stellar Mass
1.020 M☉
Metallicity [Fe/H]
-0.15
Extended Stellar Properties
Surface gravity (log g)
4.517 dex
Stellar density
1.821 g/cm³
Rotational v·sin i
4.52 km/s
Activity index (log R'HK)
-4.805
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
4.863 mas
Total Proper Motion
38.837 mas/yr
PM Right Ascension
-22.02 mas/yr
PM Declination
-31.99 mas/yr
Galactic Cartesian (pc)
x = -0.156 · y = -0.319 · z = -0.935
Equatorial (J2000)
RA 243.88502° · Dec -69.21710°
Galactic ℓ, b
319.389° · -13.161°
Ecliptic λ, β
256.764° · -46.974°
HTM-20 index
346429780
Similar Worlds
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Gas Giant · G-type yellow (Sun-like)
Radius 10.76 R⊕ · 647.3 ly
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TOI-375 b
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TOI-5210 b
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