TOI-700 d
Rank #10 of the ranked catalogue · Discovered by Transit in 2020
0.684
Earth-2.0 index
rank #10
0.943
Earth Similarity Index
0.918–0.964 (68% CI)
59%
Conservative HZ probability
1.07 R⊕
Radius
mass: inferred_mass_radius
At a glance
TOI-700 lies 101.52 light-years (31.127 pc) from the Sun. TOI-700 is a M2.5 V star with 0.415× the Sun's mass and 0.421× its radius (effective temperature 3459 K, versus the Sun's 5772 K). It is a single star hosting 4 known planets. TOI-700 d is 1.07× Earth's radius, an estimated 1.25× Earth's mass, inferred from its radius rather than measured, completing one orbit every 37.4 days at 0.1633 AU, on a mildly eccentric orbit (e = 0.04). It receives about 0.85× the flux Earth gets from the Sun, for an equilibrium temperature near 244 K (Earth's is 254 K).
Orbit and habitable-zone boundaries computed in Python from this system’s actual parameters. Sizes and the overall scale are compressed for visibility, not literal; green = conservative HZ, gold = optimistic HZ.
| Boundary | S_eff (Earth units) |
|---|---|
| recent venus | 1.5227 |
| runaway greenhouse | 0.8728 |
| moist greenhouse | 0.8697 |
| maximum greenhouse | 0.2439 |
| early mars | 0.2185 |
No published transmission spectrum exists for this planet in the NASA Exoplanet Archive.
Fitted depth disagrees with the published value. In a multi-planet system this usually means the fold is contaminated by other planets' transits rather than isolating the target. This fit is NOT reported as a measurement.
| Parameter | Value | Source |
|---|---|---|
| Planet radius | 1.0730 | Gilbert et al. 2023 |
| Planet mass | 1.2500 | archive-calculated (not a publication) |
| Orbital period | 37.4240 | Gilbert et al. 2023 |
| Semi-major axis | 0.1633 | Gilbert et al. 2023 |
| Incident flux | 0.8500 | Gilbert et al. 2023 |
| Equilibrium temperature | 268.8000 | Rodriguez et al. 2020 |
| Bulk density | 5.5600 | archive-calculated (not a publication) |
| Orbital eccentricity | 0.0420 | Gilbert et al. 2023 |
| Stellar effective temperature | 3459.0000 | Gilbert et al. 2023 |
| Stellar radius | 0.4210 | Gilbert et al. 2023 |
| Stellar mass | 0.4150 | Gilbert et al. 2023 |
| Stellar luminosity | -1.6402 | Gilbert et al. 2023 |
| Stellar metallicity | -0.0700 | Gilbert et al. 2023 |
| Stellar age | 1.5000 | Kokori et al. 2023 |
| System distance | 31.1265 | TICv8 |
Component scores
Earth similarity
0.943Conservative habitability
0.552Observational confidence
0.613Characterisation potential
0.519Evidence
- Independent references
- 4
- Published parameter sets
- 4
- Composite parameter sources
- 5 · mixed
- Default-solution coverage
- 75%
- Composite ↔ default difference
- 0% median
- Uncertainty coverage
- 83%
- Discovery method
- Transit
- Discovery year
- 2020
The archive composite selects values from multiple publications. This is disclosed separately and is not automatically penalised.
Observability
- TSM
- 3.62
- RV semi-amplitude (expected)
- 0.430 m/s
- Transit-time σ at 2030
- 55.1 min
- Max angular separation
- 5.25 mas
- Reflected-light contrast
- 7.49e-9
Follow-up lanes are diagnostics, not ranking inputs. Reflected light assumes Ag = 0.30 and Lambertian quadrature.
Any rendering of this world is a scientifically informed visualisation, not an image. No exoplanet has been imaged at surface resolution. Surface and cloud appearance are illustrative of a physically plausible class, not observations.