The brightest star of the constellation (1.85mag) is located in the southern part of the arc and reaches a maximum height of 7 degrees above the southern horizon at its culmination. It has a white color. It shines as bright as 250 Suns from a distance of 125 light years. It is also an optical double star, with a companion of seventh magnitude located about 3.3 arc minutes to the northwest, which can also be observed with a telescope.