It shines with a combined apparent magnitude of 4.13,[9] meaning it is visible to the unaided eye in all night skies except those brightly lit in inner city locations.

[11] Being 40% more massive than the Sun and 3.2 billion years old, it expanded to over 20 times the Sun's size and cooled to an effective temperature of 4,408 K.[6] That is, Epsilon Coronae Borealis's diameter is about one-quarter of Mercury's orbit.

[6] Epsilon Coronae Borealis B is a companion star thought to be an orange dwarf of spectral types K3V to K9V that orbits at a distance of 135 astronomical units, completing one orbit every 900 years.

[12] A faint (magnitude 11.5) star, 1.5 arc minutes away, has been called Epsilon Coronae Borealis C although it is only close by line of sight and is unrelated to the system.

This has been calculated to be a planet around 6.7 times as massive as Jupiter orbiting at a distance of 1.3 astronomical units with an eccentricity of 0.11.