Kosmos 23 (Russian: Космос 23 meaning Cosmos 23), also known as Omega No.2, was a satellite which was launched by the Soviet Union in 1963. It was an satellite, derived from the Dnepropetrovsk Sputnik series. It was a 347 kilograms (765 lb) spacecraft, which was built by the Yuzhnoye Design Office, and was used to conduct experiments with the use of gyroscopes to control spacecraft, for VNIIEM.