· · · ·

A fifth magnitude star lying near the end of the Tail of Serpens the Serpent as it points northeastward along the Milky Way towards Aquila. d Serpentis falls between the brighter stars Eta Serpentis and Alya, the star that marks the end of the Serpent's Tail. It lies some 469 light years from the Solar System.

d Serpentis is a ternary star system. At its heart is a binary pair in close orbit around one another, with a third star pursuing a more distant path around the central pair. The central binary consists of a yellow giant and a white main sequence star in an extremely close orbit, while the third more distant companion is a yellow-orange giant. The entire system shows irregular changes in brightness due to eruptive activity, perhaps due to interactions between the two close central stars of the system.


Related Entries