Key parameters at a glance
- A radius of 9.58 Earth radii
- A mass of 53.40 Earth masses
- Surface gravity around 0.58 g
- An orbital period of 3.371 days
- Semi-major axis 0.0260 AU
- Equilibrium temperature 418 K (145 °C)
- Distance from Earth 240.75 light-years
- Earth Similarity Index 0.304
- Travel time at Voyager 1 speed 4,245,553 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-6894 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#37of 574
top 6.3%
This planet
9.58R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | TOI-6894 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 9.58 | 11.21 |
| Mass (M⊕) | 1.00 | 53.40 | 317.83 |
| Density (g/cm³) | 5.51 | 0.33 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.58 | 2.53 |
| Insolation (S⊕) | 1.00 | 5.54 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 53.395 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 67512645
Gaia DR2
Gaia DR2 3917278287286247808
Gaia DR3
Gaia DR3 3917278287286247808
System
TOI-6894
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.37 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0260 AU.
Transit Fingerprint
Depth
16.659 %
Duration
1.422 h
Impact parameter b
0.177
Rp / R★
0.386000
Transit midpoint (BJD)
2,460,313.4117
Photometric dip
Transit produces a flux drop of 166,590 ppm lasting ≈ 1.42 h.
Extended Orbital Architecture
Planet / star radius ratio
0.386000
Semi-major axis / stellar radius
24.590
Impact parameter (b)
0.177
RV semi-amplitude (K)
65.500 m/s
Transit mid-time (BJD)
2,460,313.4117
Angular separation (arcsec)
0.35300
Eq. Temperature
418K
(145 °C)
Insolation (S⊕)
5.54
Earth = 1.00
Earth Similarity (ESI)
0.304
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
Bryant et al. 2025Instrument
TESS CCD Array
Publication
2025-06
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-6894
Spectral Class
M-type red dwarf
Effective Temperature
3,007 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.228 R☉
Stellar Mass
0.207 M☉
Metallicity [Fe/H]
0.14
Extended Stellar Properties
Surface gravity (log g)
5.039 dex
Stellar density
24.730 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 9 bands
Astrometric Data
Parallax
13.520 mas
Total Proper Motion
148.461 mas/yr
PM Right Ascension
-146.80 mas/yr
PM Declination
22.14 mas/yr
Galactic Cartesian (pc)
x = -0.970 · y = 0.111 · z = 0.216
Equatorial (J2000)
RA 173.46914° · Dec 12.45109°
Galactic ℓ, b
248.064° · 66.646°
Ecliptic λ, β
169.048° · 8.838°
HTM-20 index
2058800198
Similar Worlds
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