2010 RJ53 The asteroid that’s making a flyby this week on September 9 is the 774-metre large 2010 RJ53. It is expected to fly by around 366,000 kilometres away from the planet, indicating that it will actually be closer to Earth than the Moon that’s around 384,400 kilometres away. 2021 PT Sunday i.e. on September 11, we’ll see another asteroid dubbed 2021PT. Although not as large as the 2010 RJ53, it's still quite substantial at around 137 metres in diameter at a distance of around 4.9 million kilometres away from Earth. 2021 NY1 The third asteroid that’s expected to fly...