| Observation data EpochJ2000 EquinoxJ2000 | |
|---|---|
| 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−Vcolor index | 1.57 ± 0.07[2] |
| LHS 6343 B | |
| Spectral type | M5V[3] |
| B−Vcolor 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° |
| Periastronepoch (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 | 0.358 ± 0.011[6] M☉ |
| Radius | 0.373 ± 0.005[6] 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 | 0.292 ± 0.013[6] M☉ |
| Radius | 0.394 ± 0.012[6] R☉ |
| Temperature | 3354 ± 17[6] K |
| Metallicity [Fe/H] | 0.04 ± 0.08[2] dex |
| LHS 6343 C | |
| Mass | 62.1 ± 1.2[6] MJup |
| Radius | 0.783 ± 0.011[6] RJup |
| Luminosity | 6.91×10−6[7] L☉ |
| Surface gravity (log g) | 5.35 ± 0.02[2] cgs |
| Temperature | 1130 ± 50[7] K |
| Age | 5 ± 1[7] 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 astar system in the northernconstellation ofLyra. It appears exceedingly faint with a combinedapparent magnitude of 13.435.[2] Based on its stellar properties, the system is thought to be about 119.4light-years (36.6parsecs) away.[2]
LHS 6343 is abinary star with twored dwarfs, designated LHS 6343 A and B, respectively. Abrown dwarf orbits LHS 6343 A at a close distance, and periodicallytransits it.[2] The brown dwarf, designated LHS 6343 C, is located within thebrown dwarf desert, a zone around stars where very few brown dwarfs have been discovered.[2]
The system was in the field of view of theKepler 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 visualbinary. Both stars arered dwarf stars that are much less massive compared to theSun—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 usingadaptive optics, showing an angular separation of 0.55″,[2] corresponding to a distance of about 20astronomical units (AU).[8]
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 1130K.[7] The system hierarchy is similar toNLTT 41135, another red dwarf binary with a brown dwarf orbiting one of the stars.[2]
LHS 6343 may have a massive planet within the system.[8] In 2012,transit-timing variation was analyzed for any possible substellar companions that may beperturbing the brown dwarf from its normal orbit. Such an object would be less massive thanJupiter and its orbital period would be 3.5 to 8 times larger than that of the brown dwarf. However, the hypothetical perturber's existence has not been confirmed and warrants more observations of the system.[8]
| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b(unconfirmed) | 0.1–1MJ | — | 44.45–101.6 | — | — | — |