Ukrainian military signals intelligence satellite. Study 1970. Improved version of Tselina-O. Either not put into production or later launches listed as Tselina-O were actually of Tselina-OM model. Navigation / Communication satellite built by NPO Prikladnoi Mekhaniki (NPO PM), Russia. Launched 1967 - 1978. Used KAUR-1 bus.
AKA: 11F617. Status: Study 1970. First Launch: 1967-11-23. Last Launch: 1978-07-27. Number: 26 . Gross mass: 800 kg (1,760 lb).