Russian Satellite Hit by Debris from Chinese Anti-Satellite Test

path of satellites
On Jan. 22, 2013, debris from a Chinese anti-satellite program test hit a Russian satellite. (Image credit: Courtesy of Analytical Graphics, Inc.)

A small Russian spacecraft in orbit appears to have been struck by Chinese space junk from a 2007 anti-satellite test, likely damaging the Russian craft, possibly severely, has learned.

The space collision appears to have occurred on Jan. 22, when a chunk of China's Fengyun 1C satellite, which was intentionally destroyed by that country in a 2007 anti-satellite demonstration, struck the Russian spacecraft, according to an analysis by the Center for Space Standards & Innovation (CSSI) in Colorado Springs, Colorado.

CSSI technical program manager T.S. Kelso reported that the collision involved the Chinese space junk and Russia's small Ball Lens In The Space (BLITS) retroreflector satellite, a 17-pound (7.5 kilograms). The Fengyun 1C satellite debris was created during China's anti-satellite test on Jan. 11, 2007, and has posed a threat to satellites and crewed spacecraft ever since.

Evidence of the space junk collision was first reported on Feb. 4 by Russian scientists Vasiliy Yurasov and Andrey Nazarenko, both with the Institute for Precision Instrument Engineering (IPIE) in Moscow. They reported a "significant change" in the orbit of the BLITS satellite to the CSSI. [Watch the Animation: Russian Satellite Hit by Space Junk]

It is not immediately clear whether the satellite is merely wounded or completely incapacitated.

The space collision is the second substantial in-space accident between an active spacecraft and a defunct satellite or piece of space debris. In February 2009, a U.S. communications satellite was destroyed when it was hit by a defunct Russian military satellite, creating a vast debris cloud in orbit.

Tiny Russian satellite hit

and Russia's small Ball Lens In The Space (BLITS) retroreflector satellite is a 17-pound (7.5 kilograms) built for satellite laser ranging experiments. It launched in 2009 and was expected to last five years in space before it was struck by Chinese space junk on Jan. 22, 2013. (Image credit: IPIE, NASA)

The BLITS satellite is a nanosatellite consisting of two outer hemispheres made of a low-refraction-index glass, and an inner ball lens made of a high-refraction-index glass. It was launched in 2009 as a secondary payload on a Russian rocket and tracked by the International Laser Ranging Service for precision satellite laser-ranging experiments.

In addition to noticing the satellite's change in orbit, Yurasov and Nazarenko also detected changes in the spacecraft's spin velocity and attitude. [Worst Space Debris Events of All Time]

Satellite laser ranging use short-pulse lasers and state-of-the-art optical receivers and timing electronics to measure the two-way time of flight (and hence distance) from ground stations to retroreflector arrays on Earth orbiting satellites.

On Feb. 28, the International Laser Ranging Service confirmed that the BLITS nanosatellite had collided with a piece of space debris. "As a result, an abrupt change occurred of the BLITS orbit parameters (a decrease of the orbiting period)," ILRS officials explained.

Besides this, as could be seen from an SLR station photometrical observation results, the BLITS spin period had changed from 5.6 sec before collision to 2.1 sec after collision. The ILRS Central Bureau is based at NASA's Goddard Space Flight Center in Greenbelt, Md.

Known orbit planes of Fengyun-1C debris one month after its 2007 disintegration by a Chinese anti-satellite (ASAT) interceptor. The white orbit represents the International Space Station. (Image credit: NASA Orbital Debris Program Office)

A change in orbits

The analysis by Russian scientists found that the orbital change on the BLITS satellite occurred on Jan. 22 at 2:57 a.m. EST (0757 GMT).

"They requested help in determining whether these changes might have been the result of a collision with another object in orbit," the CSSI's Kelso explained in a blog post.  

In 2007, China destroyed one of its own – an aging Fengyun-1C weather satellite – via an anti-satellite test. (Image credit: Federation of American Scientists.)

Starting from the hypothesis that an object capable of causing this change in the orbit of BLITS might be large enough to be tracked by the U.S. Space Surveillance Network, CSSI reviewed its own Satellite Orbital Conjunction Reports Assessing Threatening Encounters in Space, which is an archived database of potential space debris threats.

That review discovered only one close approach with another object, although it was supposed to be far apart, occurred for the BLITS satellite on Jan. 22.

"Although the predicted distance would seem to preclude a collision, the fact that the close approach occurred within 10 seconds of the estimated change in orbit made it appear likely that this piece of Fengyun 1C debris actually collided with BLITS," Kelso wrote.

The CSSI is continuing to work with Yurasov and Nazarenko to further assess the circumstances of this likely collision.

More review needed

Kelso told that he is trying to address technical questions on this event, such as whether the individual masses of the pieces can be determined to assess how big of a piece might have come off of BLITS satellite.

Kelso said that the U.S. military’s Joint Space Operations Center released on March 3 the first two-line element set (TLE) — a data format used to convey sets of orbital elements that describe the orbits of Earth-orbiting satellites — for debris associated with BLITS. That information further confirms CSSI’s analysis, Kelso said.

The threat of space debris to satellites and crewed spacecraft orbiting Earth has been a growing problem. There are thought to be about 600,000 objects larger than 1 cm (0.39 inches) in diameter orbiting Earth, and at least 16,000 larger than 10 cm (3.9 inches), space debris trackers have said.

 Leonard David has been reporting on the space industry for more than five decades. He is former director of research for the National Commission on Space and a past editor-in-chief of the National Space Society's Ad Astra and Space World magazines. He has written for since 1999.Follow us @SpacedotcomFacebook and Google+. Original article on

Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at:

Leonard David
Space Insider Columnist

Leonard David is an award-winning space journalist who has been reporting on space activities for more than 50 years. Currently writing as's Space Insider Columnist among his other projects, Leonard has authored numerous books on space exploration, Mars missions and more, with his latest being "Moon Rush: The New Space Race" published in 2019 by National Geographic. He also wrote "Mars: Our Future on the Red Planet" released in 2016 by National Geographic. Leonard  has served as a correspondent for SpaceNews, Scientific American and Aerospace America for the AIAA. He has received many awards, including the first Ordway Award for Sustained Excellence in Spaceflight History in 2015 at the AAS Wernher von Braun Memorial Symposium. You can find out Leonard's latest project at his website and on Twitter.