GJ 1002 c
Rank #7 of the ranked catalogue · Discovered by Radial Velocity in 2022
0.771
Earth-2.0 index
rank #7
0.751
Earth Similarity Index
0.737–0.763 (68% CI)
96%
Conservative HZ probability
1.10 R⊕
Radius
mass: msini_lower_limit
At a glance
GJ 1002 lies 15.81 light-years (4.849 pc) from the Sun. GJ 1002 is a M5.5 V star with 0.12× the Sun's mass and 0.137× its radius (effective temperature 3024 K, versus the Sun's 5772 K). It is a single star hosting 2 known planets. GJ 1002 c is 1.1× Earth's radius, at least 1.36× Earth's mass (a radial-velocity minimum mass, not the true mass), completing one orbit every 21.2 days at 0.0738 AU. It receives about 0.26× the flux Earth gets from the Sun, for an equilibrium temperature near 181 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 | 1.4979 |
| runaway greenhouse | 0.8650 |
| moist greenhouse | 0.8556 |
| maximum greenhouse | 0.2322 |
| early mars | 0.2055 |
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 | 1.1000 | archive-calculated (not a publication) |
| Planet mass | 1.3600 | Suárez Mascareño et al. 2023 |
| Orbital period | 21.2020 | Suárez Mascareño et al. 2023 |
| Semi-major axis | 0.0738 | Suárez Mascareño et al. 2023 |
| Incident flux | 0.2570 | Suárez Mascareño et al. 2023 |
| Equilibrium temperature | 181.7000 | Suárez Mascareño et al. 2023 |
| Bulk density | 5.6100 | archive-calculated (not a publication) |
| Stellar effective temperature | 3024.0000 | Suárez Mascareño et al. 2023 |
| Stellar radius | 0.1370 | Suárez Mascareño et al. 2023 |
| Stellar mass | 0.1200 | Suárez Mascareño et al. 2023 |
| Stellar luminosity | -2.8520 | Suárez Mascareño et al. 2023 |
| Stellar metallicity | -0.2500 | Suárez Mascareño et al. 2023 |
| System distance | 4.8487 | TICv8 |
Component scores
Earth similarity
0.751Conservative habitability
0.883Observational confidence
0.644Characterisation potential
—Evidence
- Independent references
- 1
- Published parameter sets
- 1
- Composite parameter sources
- 3 · mixed
- Default-solution coverage
- 82%
- Composite ↔ default difference
- 0% median
- Uncertainty coverage
- 83%
- Discovery method
- Radial Velocity
- Discovery year
- 2022
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)
- 1.292 m/s
- Transit-time σ at 2030
- —
- Max angular separation
- 15.22 mas
- Reflected-light contrast
- 3.86e-8
Follow-up lanes are diagnostics, not ranking inputs. Reflected light assumes Ag = 0.30 and Lambertian quadrature.
Identifiers
- system_name
- GJ 1002
Other planets in this system
- GJ 1002 b10.35 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.