Asteroids 2018 SM and SD2 flew past Earth at 0.11 and 0.25 LD
Two newly discovered asteroids – 2018 SM and SD2 – flew past Earth within 1 lunar distance on September 15 and 25, 2018. Asteroid SD2 is now the 51st known asteroid to flyby Earth within 1 lunar distance since the start of the year and 11th this month, making…