New Delhi | Jagran Lifestyle Desk: Every year on June 30, World Asteroid Day is observed. This day is observed on the anniversary of the Siberian Tunguska event that took place on the same date in 1908. It was the most harmful asteroid-related event on Earth in recent history. As per belief, asteroids are space rocks thought to be the remains left after the formation of the solar system. So as the day is here, we have listed down the 5 biggest and most dangerous asteroids discovered so far.

1. 1866 Sisyphus

A stony asteroid and near-Earth object, 1866 Sisyphus is the largest member of the Apollo group, approximately 7 kilometers in diameter. It will pass 17,325,000 km from Earth on 24 November 2071, and will peak at roughly apparent magnitude 9.3 on 26 November 2071. It is one of the brightest near-Earth asteroids.

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