f Eridani

f Eridani is visible to the naked eye as a single star with a magnitude of 4.25.

[12] Both stars have an annual parallax shift 18.8 mas, which provides a distance estimate to the system of 173 light years.

The pair are members of the Tucana-Horologium moving group, a 45 million year old set of stars that share a common motion through space.

[2] The brighter component, HD 24072, is a B-type main-sequence star with a classification of B9.5 Van.

The visible component is an A-type main-sequence star with a stellar classification of A1 Va.[4] It is a suspected variable star of unknown type showing an amplitude of 0.05 magnitude,[5] and is a source of X-ray emission, which may originate from a companion of class G2-5V.