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SS-520

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Status: Active. First Launch: 1998-02-05. Last Launch: 2018-02-03. Number: 4 . 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).

The SS-520 was a two-stage rocket, the first stage consisting of the main booster of the S-520. It had a capability of launching a 140 kg payload to an altitude of about 1,000 km.

• ENA / EPS / LAP Test / plasma mission - . Nation: Japan. Agency: ISAS. Apogee: 750 km (460 mi).

• Ionosphere mission - . Nation: Japan. Agency: ISAS. Apogee: 1,108 km (688 mi).

• TRICOM-1 - . Nation: Japan. Class: Technology. Type: Technology satellite. Spacecraft: Cubesat. COSPAR: 2017-0F01. Apogee: 200 km (120 mi). Perigee: -6,340 km (-6,340 mi). Inclination: 30.00 deg.

  See TRICOM 1. Japan attempted to launch a single cubesat into orbit with a launch vehicle massing less than 3 tonnes. The SS-520 sounding rocket was furnished with a 78 kg third stage which was intended to orbit a 3U, 3 kg cubesat, TRICOM-1. The mission was flight SS-520-4 (SS-520-1 and 2 were normal sounding rocket flights; 3 has not yet flown.) However, telemetry was lost 20 seconds into flight, during first stage burn. Following range safety rules, the command to ignite stage 2 was not sent and the vehicle flew a suborbital path to about 200 km altitude and then splashed down in the ocean. The record smallest successful orbital launch vehicle remains the 9.4-tonne Lambda 4S, also Japanese, which was retired in 1979.

• Tasuki - . Payload: TRICOM-1R; TRICOM-1R (TASUKI). Nation: Japan. USAF Sat Cat: 43201 . COSPAR: 2018-016A. Apogee: 256 km (159 mi). Perigee: 143 km (88 mi). Inclination: 30.94 deg. Period: 88.48 min. See TRICOM 1R (Tasuki). ..