| |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cygnus[1] |
| Right ascension | 19h30m 00.90060s[2] |
| Declination | 41° 49′ 49.5183″[2] |
| Characteristics | |
| Evolutionary stage | Main sequence red dwarf |
| Spectral type | M5V[3] |
| Apparent magnitude (B) | 19.1[4] |
| Apparent magnitude (R) | 16.6[4] |
| Apparent magnitude (J) | 13.379±0.023[4] |
| Apparent magnitude (H) | 12.852±0.020[4] |
| Apparent magnitude (K) | 12.589±0.026[4] |
| Astrometry | |
| Proper motion (μ) | RA: −135.831(42)[2] mas/yr Dec.: −99.524(53)[2] mas/yr |
| Parallax (π) | 10.7808 ± 0.0372 mas[2] |
| Distance | 303 ± 1 ly (92.8 ± 0.3 pc) |
| Details[5] | |
| Mass | 0.1977±0.0051 M☉ |
| Radius | 0.2317±0.0049 R☉ |
| Surface gravity (log g) | 5.004±0.021 cgs |
| Temperature | 3240±61 K |
| Metallicity [Fe/H] | −0.15±0.11 dex |
| Other designations | |
Kepler-1649, KOI-3138, KIC 6444896, 2MASS J19300092+4149496[4] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Kepler-1649 is a red dwarf star of spectral type M5V with a radius 0.232 R☉, a mass 0.198 M☉, and a metallicity of -0.15 [Fe/H].[3][5]
Two confirmed planets orbit the star: Kepler-1649b and Kepler-1649c.[6] Kepler-1649b is similar to Venus, whereas Kepler-1649c is a potentially habitable exoplanet similar to Earth.[7][8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.03 M🜨 | 0.0514±0.0028 | 8.689099±0.000025 | — | 89.150+0.110 −0.079° |
1.017±0.051 R🜨 |
| c | 1.2 M🜨 | 0.0649±0.002[failed verification] | 19.53527±0.00010 | — | 89.339±0.056° | 1.06+0.15 −0.10 R🜨 |
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