Key parameters at a glance
- A radius of 6.80 Earth radii
- A mass of 959.84 Earth masses
- Surface gravity around 20.76 g
- An orbital period of 82.687 days
- Semi-major axis 0.3490 AU
- Equilibrium temperature 347 K (74 °C)
- Distance from Earth 704.68 light-years
- Earth Similarity Index 0.417
- Travel time at Voyager 1 speed 12,427,024 years
1 sibling around TOI-4600
TOI-4600 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| TOI-4600 b this | Neptune-like | 6.80 | 959.84 | 82.687 | 347 | 2023 |
| TOI-4600 c | Neptune-like | 9.42 | 2,946.27 | 482.819 | 191 | 2023 |
TOI-4600 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#220of 574
top 38.2%
This planet
6.80R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | TOI-4600 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 6.80 | 11.21 |
| Mass (M⊕) | 1.00 | 959.84 | 317.83 |
| Density (g/cm³) | 5.51 | — | 1.33 |
| Surface Gravity (g) | 1.00 | 20.76 | 2.53 |
| Insolation (S⊕) | 1.00 | 3.32 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 959.842 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 232608943
Gaia DR2
Gaia DR2 1631416599805196544
Gaia DR3
Gaia DR3 1631416599805196544
System
TOI-4600
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 82.69 Earth days (22.6% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.3490 AU.
Transit Fingerprint
Depth
0.653 %
Duration
7.540 h
Impact parameter b
0.390
Rp / R★
0.076900
Transit midpoint (BJD)
2,459,750.1421
Photometric dip
Transit produces a flux drop of 6,530 ppm lasting ≈ 7.54 h.
Extended Orbital Architecture
Planet / star radius ratio
0.076900
Impact parameter (b)
0.390
Transit mid-time (BJD)
2,459,750.1421
Long. of periastron (ω)
260.00°
Angular separation (arcsec)
1.62000
Eq. Temperature
347K
(74 °C)
Insolation (S⊕)
3.32
Earth = 1.00
Earth Similarity (ESI)
0.417
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure.
Discovery Paper
Primary reference
Mireles et al. 2023Instrument
TESS CCD Array
Publication
2023-09
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-4600
Spectral Class
K-type orange
Effective Temperature
5,170 K — cooler than the Sun (5,778 K)
Estimated Age
2.30 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.810 R☉
Stellar Mass
0.890 M☉
Metallicity [Fe/H]
0.16
Extended Stellar Properties
Surface gravity (log g)
4.570 dex
Stellar density
2.360 g/cm³
Rotational v·sin i
2.50 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
4.600 mas
Total Proper Motion
7.462 mas/yr
PM Right Ascension
7.46 mas/yr
PM Declination
0.22 mas/yr
Galactic Cartesian (pc)
x = -0.086 · y = -0.421 · z = 0.903
Equatorial (J2000)
RA 258.45037° · Dec 64.56617°
Galactic ℓ, b
94.516° · 34.732°
Ecliptic λ, β
197.323° · 84.832°
HTM-20 index
-1253276456
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