Key parameters at a glance
- A radius of 14.20 Earth radii
- A mass of 387.00 Earth masses
- Surface gravity around 1.92 g
- An orbital period of 5.332 days
- Semi-major axis 0.0690 AU
- Equilibrium temperature 1,494 K (1221 °C)
- Distance from Earth 1,097.87 light-years
- Earth Similarity Index 0.086
- Travel time at Voyager 1 speed 19,360,887 years
TOI-1601 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#365of 1771
top 20.6%
This planet
14.20R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-1601 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 14.20 | 11.21 |
| Mass (M⊕) | 1.00 | 387.00 | 317.83 |
| Density (g/cm³) | 5.51 | 0.74 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.92 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,071.42 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 387.000 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 139375960
Gaia DR2
Gaia DR2 338382713564401920
Gaia DR3
Gaia DR3 338382713564401920
System
TOI-1601
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.33 Earth days (1.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0690 AU.
Transit Fingerprint
Depth
0.422 %
Duration
6.485 h
Impact parameter b
0.359
Rp / R★
0.059306
Transit midpoint (BJD)
2,458,793.2753
Photometric dip
Transit produces a flux drop of 4,220 ppm lasting ≈ 6.49 h.
Extended Orbital Architecture
Planet / star radius ratio
0.059306
Semi-major axis / stellar radius
6.760
Impact parameter (b)
0.359
RV semi-amplitude (K)
107.800 m/s
Transit mid-time (BJD)
2,458,793.2753
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
0.20500
Eq. Temperature
1,494K
(1221 °C)
Insolation (S⊕)
1,071.42
Earth = 1.00
Earth Similarity (ESI)
0.086
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
Rodriguez et al. 2021Instrument
TESS CCD Array
Publication
2021-04
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1601
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,982 K — hotter than the Sun (5,778 K)
Estimated Age
2.40 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
2.195 R☉
Stellar Mass
1.506 M☉
Metallicity [Fe/H]
0.34
Extended Stellar Properties
Surface gravity (log g)
3.928 dex
Stellar density
0.198 g/cm³
Systemic radial velocity
-7.80 km/s
Rotational v·sin i
6.40 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.944 mas
Total Proper Motion
21.726 mas/yr
PM Right Ascension
21.71 mas/yr
PM Declination
-0.87 mas/yr
Galactic Cartesian (pc)
x = 0.592 · y = 0.468 · z = 0.656
Equatorial (J2000)
RA 38.36157° · Dec 41.01343°
Galactic ℓ, b
142.890° · -17.872°
Ecliptic λ, β
49.412° · 24.570°
HTM-20 index
503610754
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