Eta Ophiuchi is a white star which forms the southern-most point of the body of Ophiuchus.

The star is convenient for locating the tail of the serpent (Serpens Cauda), as this constellation resumes (nu Serpentis) at a point just northeast of eta Ophiuchi: binoculars.

To find eta drop southwest about ten degrees from delta Ophiuchi. You'll come across zeta Oph; (considered Ophiuchus' left knee). Another ten degrees southwest brings you to eta.

The star cluster in the same field (M9) is quite faint and unspectacular.