Ironically, the secondary payload that launched with Hitomi was a micro-sat which monitors space debris.<p><a href="https:&#x2F;&#x2F;www.frontier.phys.nagoya-u.ac.jp&#x2F;en&#x2F;chubusat&#x2F;chubusat_satellite3.html" rel="nofollow">https:&#x2F;&#x2F;www.frontier.phys.nagoya-u.ac.jp&#x2F;en&#x2F;chubusat&#x2F;chubusa...</a>