Since 1979 a team consisting of T.S.Belyakina, N.I.Bondar’, K.K.Chuvaev, Yu.S.Efimov, R.E.Gershberg, V.I.Krasnobabtsev, E.P.Pavlenko, P.P.Petrov, I.S.Savanov, N.I.Shakhovskaya, N.M.Shakhovskoj, A.G.Shcherbakov and V.I.Shenavrin from the Crimea, Dr. V.Piirola from Finland and Drs D.Chochol, L.Hric and J.Grygar from Czechoslovakia are carrying out a coordinated study of pecular Kuwano-Honda (PU Vul) object, and this short report is made on behalf of the team.

PU Vul flared up from 14m to 9m in 1978 and up to date maintains the high brightness. Our studies include the optical and IR photometry, spectroscopy, spectrophotometry, polarimetry and UV observations with the space station Astron. The general character of brightness variations and time distribution of our observations are given in Fig.1.