Last update:  2025-06-07
« Rockets

SS-520

StatusActive
CountryJapan
ManufacturerIHI Corporation
Number of orbital launches2
First launch2017-01-14
Last launch2018-02-03

The smallest orbital launch capable rocket. The SS-520 booster is based on the SS-520 sounding rocket, a two-stage vehicle developed by IHI Aerospace and JAXA’s Institute of Space and Astronautical Science.



Launches:

Launch dateLaunch siteRocket / VariantPayloadNotesStatus
2018-02-03KagoshimaSS-520 3 stageTricom 1Rsuccess
The smallest rocket to ever put an object in orbit around Earth.
2017-01-14KagoshimaSS-520 3 stageTricom 1failure
Telemetry lost after first stage burn, around 20 seconds after liftoff. Problem traced to a power supply failure in the rocket’s telemetry and command system, which was likely caused by a damaged wire that caused a short circuit.

Variants:

(This section is under construction)

SS-520 3 stage

First launch2017-01-14
Stages3
Mass2.9 t
Height9.54 m
Diameter0.52 m
Payload capacity:
LEO4 kg to 180 x 1,500km / 31 deg

A third stage was added on top of the base suborbital variant to give it the capability to reach orbital speeds of more than 17,000 mph (27,000 kilometers per hour).

SS-520 2 stage

Stages2

The basic SS-520 sounding rocket is designed to propel more than 300 pounds (140 kilograms) of science research instrumentation to an altitude of nearly 500 miles (800 kilometers) for a few minutes of exposure to space before falling back to Earth. It has no orbital capability

Updated once to twice a month.  Last update:  2025-06-07
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