This paper aims at a) introducing the space dust impacts detector developed at Kyushu Institute of Technology (KIT), b) presenting the detector utility for the evaluation of ejecta, and c) raising awareness of the space community regarding the risk represented by orbital debris. The space dust impacts detector introduced into this paper belongs to the in-situ detection systems and has for purposes to be a) light, 30g, b) low cost, about EUR200, c) low power consuming, 0.01W, d) easily adaptable on-board of spacecraft, and e) able to detect impacts of debris with a diameter ranging from 100μm to 600μm. The detector is mounted on the nano-satellite, Horyu-II, developed at KIT and launched on May 18, 2012. The data received will be very helpful to identify the detector's strengths and weaknesses to improve it and create a second version that will aim at evaluating ejecta fragments produced during hypervelocity impact testing. An accurate evaluation of ejecta is critical for orbital debris risk assessment and mitigation. If all space activities were stopped, debris will still be created by chain reaction. The number of debris could then become so large, that the access to certain LEOs will be quasi-impossible, which will jeopardize the space exploration as well as scientific, educational, and security missions that benefit to all mankind. Debris is therefore a serious issue that should be taken into consideration at every step of the development of a small or large spacecraft.