Kosmos 335 (Russian: Космос 335 meaning Cosmos 335), also known as DS-U1-R No.1, was a Soviet satellite which was launched in 1970 as part of the Dnepropetrovsk Sputnik programme.

It was a 295-kilogram (650 lb) spacecraft,[1] which was built by the Yuzhnoye Design Bureau, and was used to study spectral ranges in the Earth's atmosphere.

[2] The launch occurred at 22:24:48 UTC on 24 April 1970, and resulted in the successfully insertion of the satellite into low Earth orbit.

[4] The North American Aerospace Defense Command assigned it the catalogue number 04380.

[1][5] It was operated in an orbit with a perigee of 247 kilometres (153 mi), an apogee of 391 kilometres (243 mi), 48.4 degrees of inclination, and an orbital period of 90.9 minutes.