Japan’s Astroscale Launches Space Debris Disposal Satellite


The launch is a “ride-share” mission, with a payload of many satellites — the main one from South Korea, a few belonging to Japan’s Axelspace and one for Astroscale. The Astroscale satellite will separate from the rocket later on Monday. Astroscale CEO Nobu Okada said that his engineers will be busier now: checking signals from the satellite, making sure it has the right attitude toward the Earth, activating the solar panels and so forth. The company’s general manager, Miki Ito, said she is just relieved to see that the rocket was launched successfully after two days’ delay. 

There are an estimated 25,000 pieces of space junk in Earth orbit. This debris is created when satellites go dead, collide, or when spent rocket boosters stay in orbit instead of reentering Earth’s atmosphere and burning up. Astroscale was founded in 2013 by Okada, a former McKinsey & Co. consultant, who has been interested in space since he participated in a junior space camp in the U.S. at age 15. His company now has 180 employees, half Japanese and half non-Japanese, in Japan, the United States, the U.K., Israel and Singapore.

“We are an environmental company,” said Chris Blackerby, Astroscale’s chief operating officer. “Orbit is just another natural resource, just like forests, rivers and oceans. If we don’t clean it, there’s going to be problems.” The 175 kg Elsa-D will enter orbit with 17 kg of mock debris. After spending the first couple of months getting ready for the mission, it will conduct three different test maneuvers.

The need for a cleanup will sharpen as more satellites are launched. Okada says that 46,000 more satellites are expected to be launched in the next 10 years, as companies like SpaceX and Amazon, both of the U.S., put up satellite internet constellations and start offering space tourism. Okada says his goal is to make Astroscale a pioneer in environmentally sustainable space flight. The debris is a hazard for the roughly 3,000 satellites now operating in space. It also poses a threat to the International Space Station, which has six astronauts on board.

Elsa-D will move toward the test debris using GPS information, estimate its exact position and analyze its motion with sensors. It will then determine a path to approach the space junk and latch onto it using a magnetic docking plate before releasing it to perform another capture maneuver. This artist’s rendering show how Astroscale’s spacecraft will locate space debris, push it into the Earth’s atmosphere and burn it up. (Illustration courtesy of Astroscale)

Astroscale earns revenue by selling its services to satellite operators. One of its clients is OneWeb, a satellite constellation operator. OneWeb satellites are already equipped with a Astroscale-compatible docking plate that will allow them to be towed away if they go haywire. The retrieval operation is very different from a normal docking procedure between the International Space Station and a supply ship, where two spacecraft are communicating with each other. Dead satellites and other space junk have no fuel or other means of maneuvering. They are adrift and out of control, making it harder for a cleanup satellite to catch them. In its first maneuver, Elsa-D will gently release the test debris and then catch it. In the second, the debris is sent tumbling, requiring the spacecraft to move in sync with it. The third maneuver will simulate an actual mission, with the debris sent far away, requiring the Elsa-D to search for and locate it. 

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