  We present the results of our spectroscopic monitoring campaign of $\zeta$
Oph, carried out at the University observatory Jena with the spectrograph
FLECHAS between July 2015 and September 2016. The main aim of the project is to
determine the radial velocity of the star precisely, as a wide range of radial
velocity measurements of $\zeta$ Oph are given in the literature. Beside the
proper motion and parallax, the radial velocity is an important input parameter
for the calculation of the space motion of the star. $\zeta$ Oph is considered
to be a runaway star and potential former companion of the progenitor star of
the pulsar PSRJ1932+1059, which both may have been located in a binary system
and were then released during a supernova explosion about 1 Myr ago in the
Upper Scorpius OB association. For the calculation that the pulsar and $\zeta$
Oph could have been at the same place, a radial velocity of $-$9.0 km/s for
$\zeta$ Oph was used in the literature. By analysing the hydrogen and helium
lines in 48 FLECHAS spectra, we determined the radial velocity of $\zeta$ Oph
to be 12.2$\pm$3.3 km/s and the projected rotational velocity to 432$\pm$16
km/s with no indication for variability.
