Kepler-1649 c
Rank #6 of the ranked catalogue · Discovered by Transit in 2020
0.774
Earth-2.0 index
rank #6
0.887
Earth Similarity Index
0.809–0.930 (68% CI)
96%
Conservative HZ probability
1.06 R⊕
Radius
mass: inferred_mass_radius
At a glance
Kepler-1649 lies 300.69 light-years (92.191 pc) from the Sun. Kepler-1649 is the host star with 0.198× the Sun's mass and 0.232× its radius (effective temperature 3240 K, versus the Sun's 5772 K). It is a single star hosting 2 known planets. Kepler-1649 c is 1.06× Earth's radius, an estimated 1.2× Earth's mass, inferred from its radius rather than measured, completing one orbit every 19.5 days at 0.0649 AU. It receives about 0.75× the flux Earth gets from the Sun, for an equilibrium temperature near 237 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 | 1.5095 |
| runaway greenhouse | 0.8686 |
| moist greenhouse | 0.8622 |
| maximum greenhouse | 0.2378 |
| early mars | 0.2118 |
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.
Not requested for this build.
| Parameter | Value | Source |
|---|---|---|
| Planet radius | 1.0600 | Vanderburg et al. 2020 |
| Planet mass | 1.2000 | archive-calculated (not a publication) |
| Orbital period | 19.5353 | Vanderburg et al. 2020 |
| Semi-major axis | 0.0649 | Q1-Q17 DR25 KOI Table |
| Incident flux | 0.7500 | Vanderburg et al. 2020 |
| Equilibrium temperature | 234.0000 | Vanderburg et al. 2020 |
| Bulk density | 5.5400 | archive-calculated (not a publication) |
| Orbital eccentricity | 0.0000 | Q1-Q17 DR25 KOI Table |
| Stellar effective temperature | 3240.0000 | Vanderburg et al. 2020 |
| Stellar radius | 0.2317 | Vanderburg et al. 2020 |
| Stellar mass | 0.1977 | Vanderburg et al. 2020 |
| Stellar luminosity | -2.2873 | Vanderburg et al. 2020 |
| Stellar metallicity | -0.1500 | Vanderburg et al. 2020 |
| System distance | 92.1913 | TICv8 |
Component scores
Earth similarity
0.887Conservative habitability
0.898Observational confidence
0.502Characterisation potential
0.428Evidence
- Independent references
- 3
- Published parameter sets
- 3
- Composite parameter sources
- 4 · mixed
- Default-solution coverage
- 67%
- Composite ↔ default difference
- 0% median
- Uncertainty coverage
- 67%
- 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
- 1.92
- RV semi-amplitude (expected)
- 0.840 m/s
- Transit-time σ at 2030
- 52.5 min
- Max angular separation
- 0.70 mas
- Reflected-light contrast
- 4.63e-8
Follow-up lanes are diagnostics, not ranking inputs. Reflected light assumes Ag = 0.30 and Lambertian quadrature.
Identifiers
- system_name
- Kepler-1649
Other planets in this system
- Kepler-1649 b8.69 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.