in diameter, and can reach an altitude of 150 km. The first flight of S-310 in January 1975 was successful, and it has been launched at Kagoshima Space Center at Uchinoura, Showa Station in Antarctica and Andøya in Norway. As of January 10, 2020 the S-310 has completed 57 sub-orbital launches, with its most recent launch occurring on January 9, 2020. Gross mass: 700 kg (1,540 lb) Height: 6.80 m (22.30 ft) Diameter: 0.31 m (1.01 ft) Apogee: 190 km (110 mi) S-520 The S-520 was developed to replace the K-9M and K-10 type sounding rockets. It is an active single-stage sounding rocket capable of launching a 100 kg payload above 300 km and provided more than five minutes of micro-gravity flight for experiments. The first launch took place in 1980, and most recently flew on 11 August 2022 (UTC). Gross mass: 2,300 kg (5,000 lb) Unfueled mass: 400 kg (880 lb) Burn time: 29 s Height: 9.00 m (29.50 ft) Diameter: 0.52 m (1.70 ft) Apogee: 430 km (260 mi) SS-520 This version is a two-stage sounding rocket or three-stage orbital rocket, which uses S-520 as the first stage. Unlike the previous S-Series rockets, the SS-520 is intended to demonstrate how small an orbital launch vehicle can be. When used as a suborbital sounding rocket, it can launch a payload to an altitude between 800 and 1000 km. The first two SS-520s were launched in 1998 and 2000 respectively and successfully carried their payloads on sub-orbital missions. After further development and the addition of a third stage, the fourth and fifth instances of the SS-520 were launched on full orbital trajectories. Gross mass: 2,600 kg (5,700 lb) Height: 9.70 m (31.80 ft) Diameter: 0.52 m (1.70 ft) Apogee: 1,000 km (600 mi) SS-520-4 This is the fourth vehicle configuration of the SS-520. It includes a small third stage, and can put a 3U CubeSat into a orbit with an inclination of 31°. It is engineered to place the payload into an orbital speed of more than . It is a technology demonstration with no serial production planned. Its maiden launch was supposed to have taken place on 10 January 2017, however it was delayed due to inclement weather (wind speeds). It was launched January 14, 2017, but failed to reach orbit due to a loss of telemetry. If successful, it would have become the smallest and lightest vehicle to