Delta Equulei is a binary star system about 60 light years away,[9] with components of class G0 and F5.
One study puts the larger at 1.22 solar masses and the smaller at 1.17, while another pegs them at 1.66 and 1.593.
[10] William Herschel listed Delta Equulei as a wide binary.
Friedrich Georg Wilhelm von Struve later showed this to be an unrelated optical double star.
However his son Otto Wilhelm von Struve while making follow-up observations in 1852 found that while the separation of the optical double continued to increase, Delta Equulei itself appeared elongated.