National Astronomical Observatory of Japan
Japanese astronomers have revealed the nature of the mysterious space object, which flew over the Japanese city of Kyoto on April 29, 2017, and they are assumed to be part of the near-Earth asteroid 2003 YT1.
According to Phys.org, scientists have discovered that the rotation of the mysterious object is unstable under the influence of Yarkovsky-O’Keefe-Radzievsky-Paddeck (YORP effect). This is observed in the change of its speed under the influence of sunlight. It may lead to rotational movement and reduce the durability of the asteroid, which resulted in its division into several pieces and the appearance of dust that entered the Earth’s atmosphere.
And the 2003 YT1 asteroid can generate dangerous pieces and pieces on Earth within 10 million years. But at present the asteroid does not cause any harm to Earth. Also, the parts that were burned over Japan were not dangerous, because their sizes did not exceed a few centimeters.
Source: Linta. Ru