GJ 1061 d
Rank #2 of the ranked catalogue · Discovered by Radial Velocity in 2020
0.875
Earth-2.0 index
rank #2
0.874
Earth Similarity Index
0.842–0.902 (68% CI)
100%
Conservative HZ probability
1.16 R⊕
Radius
mass: measured
At a glance
GJ 1061 lies 11.98 light-years (3.673 pc) from the Sun. GJ 1061 is a M5.5 V star with 0.12× the Sun's mass and 0.156× its radius (effective temperature 2953 K, versus the Sun's 5772 K). It is a single star hosting 3 known planets. GJ 1061 d is 1.16× Earth's radius, 1.67× Earth's mass, directly measured, completing one orbit every 13.1 days at 0.054 AU, on a mildly eccentric orbit (e = 0.04). It receives about 0.6× the flux Earth gets from the Sun, for an equilibrium temperature near 224 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 | 1.4944 |
| runaway greenhouse | 0.8638 |
| moist greenhouse | 0.8536 |
| maximum greenhouse | 0.2304 |
| early mars | 0.2035 |
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.
| Parameter | Value | Source |
|---|---|---|
| Planet radius | 1.1600 | archive-calculated (not a publication) |
| Planet mass | 1.6700 | Dreizler et al. 2025 |
| Orbital period | 13.0660 | Dreizler et al. 2025 |
| Semi-major axis | 0.0540 | Dreizler et al. 2025 |
| Incident flux | 0.6000 | Dreizler et al. 2020 |
| Equilibrium temperature | 242.0300 | archive-calculated (not a publication) |
| Bulk density | 5.8800 | archive-calculated (not a publication) |
| Orbital eccentricity | 0.0400 | Dreizler et al. 2025 |
| Stellar effective temperature | 2953.0000 | Dreizler et al. 2025 |
| Stellar radius | 0.1560 | Dreizler et al. 2025 |
| Stellar mass | 0.1200 | Dreizler et al. 2025 |
| Stellar luminosity | -2.7696 | Dreizler et al. 2025 |
| Stellar metallicity | -0.0800 | Dreizler et al. 2025 |
| Stellar age | 7.0000 | Dreizler et al. 2025 |
| System distance | 3.6728 | TICv8 |
Component scores
Earth similarity
0.874Conservative habitability
0.896Observational confidence
0.846Characterisation potential
—Evidence
- Independent references
- 2
- Published parameter sets
- 2
- Composite parameter sources
- 4 · mixed
- Default-solution coverage
- 67%
- Composite ↔ default difference
- 0% median
- Uncertainty coverage
- 83%
- Discovery method
- Radial Velocity
- Discovery year
- 2020
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)
- 1.865 m/s
- Transit-time σ at 2030
- —
- Max angular separation
- 14.70 mas
- Reflected-light contrast
- 8.01e-8
Follow-up lanes are diagnostics, not ranking inputs. Reflected light assumes Ag = 0.30 and Lambertian quadrature.
Identifiers
- system_name
- GJ 1061
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.