LHS 1678

LHS 1678 (TOI-696) is an astrometric binary star system, located about 65 light-years from the Earth in the constellation Caelum.

[6] Gaia DR3 provides a parallax of 50.34 mas to LHS 1678, which translates into a distance of 19.86 pc (64.8 ly) to the system.

LHS 1678 A is metal-poor compared to the Sun, with an abundance of iron equivalent to 44% of the solar level.

It is located in a narrow position in the diagram, characterized by a gap in the lower main sequence.

[3] The star has little variability in its brightness, no signs of starspots or stellar flares have been found during two months of observations.

[3] The secondary companion is a probable brown dwarf, sometimes called LHS 1678 B,[7] that has been detected through long-baseline astrometry from RECONS.

The possibility of the companion to be a white dwarf is ruled out by the astrometry and radial velocity of the system.

(light-years) The red dwarf LHS 1678 hosts three exoplanets, which are smaller than Earth and were discovered by the transit method.