Despite its mean apparent magnitude of m _ { V } = 6.39 , the evolutionary status of HD 190390 ( HR 7671 ) , a luminous F-type supergiant at high galactic latitude , is still not very clear , but in most papers a post-AGB classification is assumed .
New observational material has been obtained with four different instruments and is presented here .
An extensive abundance analysis based on high resolution , high signal-to-noise NTT+EMMI spectra confirms the metal deficiency of this object ( [ Fe/H ] = - 1.6 ) , together with a high lithium content ( \log \epsilon ( Li ) = 1.9 ) .
A variability analysis based on Geneva photometry over seven years reveals beating with a period of \sim 3000 days .
It is , however , not clear whether this beating is caused by a stable triplet , or it is the consequence of small changes in the main frequency .
More recent data obtained with the HIPPARCOS satellite and the Mercator telescope not only confirm the main period , but also support the presence of a second periodicity of 11 days , which was also found in the Geneva photometry .
A conclusive evolutionary status of this object is not given , but alternative to the UU Her ( i.e .
post-AGB ) status , a W Vir classification is discussed .