Key parameters at a glance
- A radius of 5.31 Earth radii
- A mass of 50.90 Earth masses
- Surface gravity around 1.81 g
- An orbital period of 3.634 days
- Semi-major axis 0.0376 AU
- Equilibrium temperature 700 K (426 °C)
- Distance from Earth 218.22 light-years
- Earth Similarity Index 0.294
- Travel time at Voyager 1 speed 3,848,336 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-672 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#340of 574
top 59.1%
This planet
5.31R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | TOI-672 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 5.31 | 11.21 |
| Mass (M⊕) | 1.00 | 50.90 | 317.83 |
| Density (g/cm³) | 5.51 | 1.86 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.81 | 2.53 |
| Insolation (S⊕) | 1.00 | 39.80 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 50.900 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 151825527
Gaia DR2
Gaia DR2 5396580575830873728
Gaia DR3
Gaia DR3 5396580575830873728
System
TOI-672
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.63 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0376 AU.
Transit Fingerprint
Depth
0.867 %
Duration
1.800 h
Impact parameter b
0.510
Rp / R★
0.089300
Transit midpoint (BJD)
2,458,546.4796
Photometric dip
Transit produces a flux drop of 8,668 ppm lasting ≈ 1.80 h.
Extended Orbital Architecture
Planet / star radius ratio
0.089300
Semi-major axis / stellar radius
14.800
Impact parameter (b)
0.510
RV semi-amplitude (K)
32.000 m/s
Transit mid-time (BJD)
2,458,546.4796
Long. of periastron (ω)
0.00°
Angular separation (arcsec)
0.56200
Eq. Temperature
700K
(426 °C)
Insolation (S⊕)
39.80
Earth = 1.00
Earth Similarity (ESI)
0.294
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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
Mistry et al. 2023Instrument
TESS CCD Array
Publication
2023-01
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-672
Spectral Class
M-type red dwarf
Effective Temperature
3,810 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.540 R☉
Stellar Mass
0.540 M☉
Metallicity [Fe/H]
-0.14
Extended Stellar Properties
Surface gravity (log g)
4.700 dex
Stellar density
4.726 g/cm³
Systemic radial velocity
-5.07 km/s
Rotational v·sin i
3.75 km/s
Rotation period
18.50 days
Activity index (log R'HK)
-4.690
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
14.917 mas
Total Proper Motion
113.284 mas/yr
PM Right Ascension
85.14 mas/yr
PM Declination
-74.73 mas/yr
Galactic Cartesian (pc)
x = -0.757 · y = 0.161 · z = -0.634
Equatorial (J2000)
RA 167.99086° · Dec -39.32812°
Galactic ℓ, b
282.730° · 19.610°
Ecliptic λ, β
187.855° · -40.202°
HTM-20 index
-641772499
Similar Worlds
TOI-674 b
Neptune-like · M-type red dwarf
Radius 5.25 R⊕ · 150.3 ly
GJ 3293 b
Neptune-like · M-type red dwarf
Radius 5.19 R⊕ · 65.9 ly
TOI-3785 b
Neptune-like · M-type red dwarf
Radius 5.14 R⊕ · 260.2 ly
HIP 48714 b
Neptune-like · M-type red dwarf
Radius 5.11 R⊕ · 34.3 ly
TOI-6223 b
Neptune-like · M-type red dwarf
Radius 5.07 R⊕ · 434.2 ly
TOI-1728 b
Neptune-like · M-type red dwarf
Radius 5.05 R⊕ · 198.3 ly