ι Serpentis, Latinized as Iota Serpentis and abbreviated Iot Ser, is a triple star[7] system in the constellation Serpens, in its head (Serpens Caput).

[1] At the centre of the system is a spectroscopic binary, Iota Serpentis A and B.

These are both white main sequence dwarfs and both have apparent magnitudes of +5.3.

First discovered as an astrometric binary, the pair have now been resolved and visual orbits have been derived.

[5] There are two visual companions, Iota Serpentis C, a 13th magnitude star 143 arcseconds away and Iota Serpentis D, a 12th magnitude star 151 arcseconds distant.