Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Caelum[a] |
Right ascension | 04h 32m 42.635s[2] |
Declination | −39° 47′ 12.15″[2] |
Apparent magnitude (V) | 12.482[1] |
Characteristics | |
A | |
Evolutionary stage | Red dwarf |
Spectral type | M2V[3] |
Apparent magnitude (B) | 13.5[1] |
Apparent magnitude (R) | 11.533[1] |
Apparent magnitude (G) | 9.02[1] |
Apparent magnitude (H) | 8.501[1] |
Apparent magnitude (K) | 8.264[1] |
B−V color index | 1.018[1] |
B | |
Evolutionary stage | Possible brown dwarf, maybe a jovian planet[3] |
Astrometry | |
Radial velocity (Rv) | 10.94±0.28[2] km/s |
Total velocity | 94.6±0.4[3] km/s |
Proper motion (μ) | RA: +239.368 mas/yr[2] Dec.: −967.597 mas/yr[2] |
Parallax (π) | 50.34 ± 0.02 mas[2] |
Distance | 64.79 ± 0.03 ly (19.865 ± 0.008 pc)[2] |
Details[3] | |
A | |
Mass | 0.345±0.014 M☉ |
Radius | 0.329±0.01 R☉ |
Luminosity | 0.0145±0.0003 L☉ |
Temperature | 3490±50 K |
Metallicity [Fe/H] | −0.36±0.06 dex |
Rotation | 66±22 d |
Age | 4.22±0.87[4] or 4–9 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
LHS 1678 (TOI-696) is an astrometric binary star system, located about 65 light-years from the Earth in the constellation Caelum. It is made up of a red dwarf and a companion star whose nature is still uncertain, but is likely to be a brown dwarf.[3] The red dwarf star is known to host three small, close-in exoplanets.[5] The apparent magnitude of LHS 1678 is 12.5, which is too dim to be seen with the naked eye or a small telescope.[6]
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