Key parameters at a glance
- A radius of 6.41 Earth radii
- A mass of 78.50 Earth masses
- Surface gravity around 1.91 g
- An orbital period of 5.827 days
- Semi-major axis 0.0690 AU
- Equilibrium temperature 1,439 K (1166 °C)
- Distance from Earth 584.30 light-years
- Earth Similarity Index 0.126
- Travel time at Voyager 1 speed 10,304,107 years
TOI-6038 A b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#247of 574
top 42.9%
This planet
6.41R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | TOI-6038 A b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 6.41 | 11.21 |
| Mass (M⊕) | 1.00 | 78.50 | 317.83 |
| Density (g/cm³) | 5.51 | 1.62 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.91 | 2.53 |
| Insolation (S⊕) | 1.00 | 716.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 78.500 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 78.200 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
TIC
TIC 194736418
Gaia DR2
Gaia DR2 237640407346340736
Gaia DR3
Gaia DR3 237640407346340736
System
TOI-6038
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.83 Earth days (1.6% of a terrestrial year) at a mean orbital distance of 0.0690 AU.
Transit Fingerprint
Depth
0.127 %
Duration
5.042 h
Impact parameter b
0.160
Rp / R★
0.035700
Transit midpoint (BJD)
2,459,883.0580
Photometric dip
Transit produces a flux drop of 1,274 ppm lasting ≈ 5.04 h.
Extended Orbital Architecture
Planet / star radius ratio
0.035700
Semi-major axis / stellar radius
9.040
Impact parameter (b)
0.160
RV semi-amplitude (K)
23.500 m/s
Transit mid-time (BJD)
2,459,883.0580
Angular separation (arcsec)
0.38500
Eq. Temperature
1,439K
(1166 °C)
Insolation (S⊕)
716.00
Earth = 1.00
Earth Similarity (ESI)
0.126
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
Baliwal et al. 2025Instrument
TESS CCD Array
Publication
2025-01
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-6038 A
Spectral Class
F-type yellow-white
Effective Temperature
6,110 K — hotter than the Sun (5,778 K)
Estimated Age
3.65 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.648 R☉
Stellar Mass
1.291 M☉
Metallicity [Fe/H]
0.12
Extended Stellar Properties
Surface gravity (log g)
4.118 dex
Stellar density
0.412 g/cm³
Rotational v·sin i
7.94 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
5.554 mas
Total Proper Motion
41.320 mas/yr
PM Right Ascension
10.37 mas/yr
PM Declination
-40.00 mas/yr
Galactic Cartesian (pc)
x = 0.469 · y = 0.594 · z = 0.654
Equatorial (J2000)
RA 51.65727° · Dec 40.81727°
Galactic ℓ, b
152.068° · -13.113°
Ecliptic λ, β
59.732° · 21.322°
HTM-20 index
769711524
Similar Worlds
KIC 5437945 b
Neptune-like · F-type yellow-white
Radius 6.40 R⊕ · 4,155.3 ly
TOI-1052 c
Neptune-like · F-type yellow-white
Radius 6.48 R⊕ · 423.4 ly
KOI-94 e
Neptune-like · F-type yellow-white
Radius 6.56 R⊕ · 1,555.9 ly
PH1 b
Neptune-like · F-type yellow-white
Radius 6.18 R⊕ · 3,369.7 ly
Kepler-450 b
Neptune-like · F-type yellow-white
Radius 6.14 R⊕ · 1,487.2 ly
Kepler-820 b
Neptune-like · F-type yellow-white
Radius 6.09 R⊕ · 4,524.4 ly