Teegarden's Star c
Rank #5 of the ranked catalogue · Discovered by Radial Velocity in 2019
0.823
Earth-2.0 index
rank #5
0.807
Earth Similarity Index
0.791–0.820 (68% CI)
100%
Conservative HZ probability
1.02 R⊕
Radius
mass: msini_lower_limit
At a glance
Teegarden's Star lies 12.49 light-years (3.831 pc) from the Sun. Teegarden's Star is a M7.0 V star with 0.097× the Sun's mass and 0.12× its radius (effective temperature 3034 K, versus the Sun's 5772 K). It is a single star hosting 3 known planets. Teegarden's Star c is 1.02× Earth's radius, at least 1.05× Earth's mass (a radial-velocity minimum mass, not the true mass), completing one orbit every 11.4 days at 0.0455 AU, on a mildly eccentric orbit (e = 0.04). It receives about 0.35× the flux Earth gets from the Sun, for an equilibrium temperature near 196 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 | 1.4984 |
| runaway greenhouse | 0.8652 |
| moist greenhouse | 0.8559 |
| maximum greenhouse | 0.2324 |
| early mars | 0.2058 |
No published transmission spectrum exists for this planet in the NASA Exoplanet Archive.
Planet is not flagged as transiting; a light curve cannot show a transit.
Not requested for this build.
| Parameter | Value | Source |
|---|---|---|
| Planet radius | 1.0200 | archive-calculated (not a publication) |
| Planet mass | 1.0500 | Dreizler et al. 2024 |
| Orbital period | 11.4160 | Dreizler et al. 2024 |
| Semi-major axis | 0.0455 | Dreizler et al. 2024 |
| Incident flux | 0.3500 | Dreizler et al. 2024 |
| Equilibrium temperature | 209.0000 | Dreizler et al. 2024 |
| Bulk density | 5.4400 | archive-calculated (not a publication) |
| Orbital eccentricity | 0.0400 | Dreizler et al. 2024 |
| Stellar effective temperature | 3034.0000 | Dreizler et al. 2024 |
| Stellar radius | 0.1200 | Dreizler et al. 2024 |
| Stellar mass | 0.0970 | Dreizler et al. 2024 |
| Stellar luminosity | -3.1415 | Dreizler et al. 2024 |
| Stellar metallicity | -0.1100 | Dreizler et al. 2024 |
| Stellar age | 8.0000 | Zechmeister et al. 2019 |
| System distance | 3.8308 | TICv8 |
Component scores
Earth similarity
0.807Conservative habitability
0.948Observational confidence
0.676Characterisation potential
—Evidence
- Independent references
- 2
- Published parameter sets
- 2
- Composite parameter sources
- 4 · mixed
- Default-solution coverage
- 83%
- Composite ↔ default difference
- 0% median
- Uncertainty coverage
- 83%
- Discovery method
- Radial Velocity
- Discovery year
- 2019
The archive composite selects values from multiple publications. This is disclosed separately and is not automatically penalised.
Observability
- TSM
- n/a (non-transiting)
- RV semi-amplitude (expected)
- 1.414 m/s
- Transit-time σ at 2030
- —
- Max angular separation
- 11.88 mas
- Reflected-light contrast
- 8.72e-8
Follow-up lanes are diagnostics, not ranking inputs. Reflected light assumes Ag = 0.30 and Lambertian quadrature.
Identifiers
- system_name
- Teegarden's Star
Other planets in this system
- Teegarden's Star b4.91 d
- Teegarden's Star d26.13 d
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.