  In 2015 a radial velocity monitoring campaign was started in order to
redetermine and/or constrain the orbital solutions of spectroscopic binary
systems. The observations were carried out at the University Observatory Jena
with the \'Echelle spectrograph FLECHAS. The results from the main part of our
target sample are already published. For the final target of this campaign,
$\theta$ Cep, we can now present an orbital solution based on a homogeneously
covered radial velocity curve. The period of this single-lined spectroscopic
binary turns out to be significantly larger and the orbit is much more
eccentric compared to the given values in the 9th Catalogue of Spectroscopic
Binary Orbits.
