The rocket stage detached from a Chinese spacecraft is most likely the object set to strike the moon on March 4, an astronomer tracking near-Earth objects says after weighing launch time and lunar trajectory, as well as correcting previous mistakes.
As part of China’s lunar exploration program, Chang‘e 5-T1 was an experimental robotic spacecraft, which was launched to the moon on Oct. 23, 2014, by the China National Space Administration (CNSA) for atmospheric re-entry tests. It was named after the Chinese moon goddess Chang’e.
According to Gray, the Chinese lunar mission sent a small spacecraft to the moon as a precursor test for an eventual lunar-sample return mission. He held that its launch time and lunar trajectory are almost an exact match for the orbit of the object that will hit the moon in March.
Previously, Ars Technica mistook the upper stage of a Falcon 9 rocket for the mystery object, because the National Oceanic and Atmospheric Administration launched the Deep Space Climate Observatory (DSCOVR) mission in 2015. Consequently, some media outlets accused SpaceX of mishandling its second stage.
Falcon 9 is a two-stage-to-orbit medium-lift launch vehicle designed and manufactured by Elon Musk’s SpaceX.
However, it wasn’t until engineer Jon Giorgini at NASA’s Jet Propulsion Laboratory investigated the claims that this mistake was pointed out. He dismissed the conclusion in a letter to Gray on Feb. 12, saying that the DSCOVR spacecraft’s trajectory did not go particularly close to the Moon and that all data showed that the Falcon 9 stage was extremely unlikely to crash into the Moon.
Based on Giorgini’s findings, Gray reexamined his data and finally identified China’s Chang'e 5-T1 as the most probable “object about to hit the moon on 2022 Mar 4 at 12:25 UTC.”
In his blogs, Gray wrote that tracking deep-space junk has become a concern, with a growing number of spacecraft now going into high orbits. He recommended simple steps that would help to address this issue. For instance, anybody who launches objects into high orbits must make the last known position and direction publicly available to some agreed-upon institution that has funding to do the job.
Although proper disposition may have different interpretations, simply ignoring the junk issue should never be an option, the astronomer emphasized.
By the time of publication, the China National Space Administration (CNSA) did not return a request for comment.
