With an apparent magnitude of 4.9, it is located around 550 parsecs (1,800 ly) distant in the small Lacerta OB1 association.

It is a hot blue main-sequence star of spectral type O9V, a massive star that is currently fusing its core hydrogen.

It is a suspected Beta Cephei variable star.

It was one of the first O-type stars (along with S Monocerotis) to be defined as an anchor point for the MKK spectral classification; since the early twentieth century it has served as such a point.

[7] It is the star with the smallest angular diameter measured by the CHARA array, at 0.11±0.02 milliarcseconds.