LHS 6343
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(13.88 / 14.63)[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 19h 10m 14.354s[1] |
| Declination | +46° 57′ 26.14″[1] |
| Apparent magnitude (V) | 13.435 (13.88 / 14.63)[2] |
| Characteristics | |
| LHS 6343 A | |
| Spectral type | M4V[3] / T1.5[4] |
| B−V color index | 1.57 ± 0.07[2] |
| LHS 6343 B | |
| Spectral type | M5V[3] |
| B−V color index | 1.60 ± 0.07[2] |
| Astrometry | |
| Proper motion (μ) | RA: -76.59[5] mas/yr Dec.: -176.78[5] mas/yr |
| Distance | 119.4 ± 3.6[2] ly (36.6 ± 1.1[2] pc) |
| Orbit[6] | |
| Period (P) | 12.7137941 ± 0.0000002 d |
| Semi-major axis (a) | 0.0797 ± 0.0008 AU |
| Eccentricity (e) | 0.030 ± 0.002 |
| Inclination (i) | 90.45 ± 0.03° |
| Periastron epoch (T) | JD 2455008.07259 ± 0.00001 |
| Argument of periastron (ω) (secondary) | 320 ± 4° |
| Semi-amplitude (K1) (primary) | 9.69 ± 0.02 km/s |
| Details | |
| LHS 6343 A | |
| Mass | 0.363±0.020[4] M☉ |
| Radius | 0.375±0.019[4] R☉ |
| Surface gravity (log g) | 4.851 ± 0.008[2] cgs |
| Temperature | 3431±21[6] K |
| Metallicity [Fe/H] | 0.04 ± 0.08[2] dex |
| Rotation | 13.137 ± 0.011[2] |
| LHS 6343 B | |
| Mass | 0.297±0.019[4] M☉ |
| Radius | 0.318±0.018[4] R☉ |
| Temperature | 3354±17[6] K |
| Metallicity [Fe/H] | 0.04 ± 0.08[2] dex |
| LHS 6343 C | |
| Mass | 62.6±2.2[4] MJup |
| Radius | 0.788±0.043[4] RJup |
| Luminosity | 1.70+0.12 −0.11×10−5[4] L☉ |
| Surface gravity (log g) | 5.40±0.04[4] cgs |
| Temperature | 1303±29[4] K |
| Age | 2.86+0.40 −0.33 or 3.11+0.50 −0.38[4] Gyr |
| Other designations | |
| KOI-959, KIC 10002261, G 205-57, 2MASS J19101435+4657261 | |
| Database references | |
| SIMBAD | LHS 6343 |
| LHS 6343 A | |
| LHS 6343 B | |
| LHS 6343 C | |
LHS 6343 is a star system in the northern constellation of Lyra. It appears exceedingly faint with a combined apparent magnitude of 13.435.[2] Based on its stellar properties, the system is thought to be about 119.4 light-years (36.6 parsecs) away.[2]
LHS 6343 is a binary star with two red dwarfs, designated LHS 6343 A and B, respectively. A brown dwarf orbits LHS 6343 A at a close distance, and periodically transits it.[2] The brown dwarf, designated LHS 6343 C, is located within the brown dwarf desert, a zone around stars where very few brown dwarfs have been discovered.[2]
The system was in the field of view of the Kepler spacecraft,[2] and was monitored continuously for possible planets transiting the star, although the transits were found to be caused by LHS 6343 C.[2]
LHS 6343 is a visual binary. Both stars are red dwarf stars that are much less massive compared to the Sun—the primary is 36% the mass of the Sun and the secondary, 29.2% the mass of the Sun.[6] The two stars have been individually resolved using adaptive optics, showing an angular separation of 0.55″,[2] corresponding to a distance of about 20 astronomical units (AU).[7]
The brown dwarf LHS 6343 C orbits the primary star LHS 6343 A at a distance of only 0.0797 AU every 12.7 days.[6] It is about 5 billion years old, and models suggest the brown dwarf has a surface temperature of 1130 K.[8] The system hierarchy is similar to NLTT 41135, another red dwarf binary with a brown dwarf orbiting one of the stars.[2]