The largest asteroid observed in our solar system to date is the 1I/2017 U1 asteroid, from another solar system. This asteroid, named Oumuamua is up to 400 metres long and could possibly be up to 10 times as long compared to its width. The size of this asteroid suggests that is has come from another solar system and has made its way through the Milky Way on its own for possibly hundreds of millions of years. This means that it could give insight into how other solar systems formed.
Data collected shows that on the 9th September 2017, it was closest to the sun and traveling the fastest. The data from this timeframe shows the asteroid was travelling at approximately 196,000 miles per hour and was the closest to the sun as it was travlling this fast. The asteroid was slowed down by the sun’s gravity as it started to, and continued to move away from the sun. Data collected also shows that on 20th November 2017, its distance from Earth was approximately 200million kilometres. NASA has stated that data will be collected as long as the asteroid is visible.