|
Why has the chance of an impact changed?
The probability for any newly found object colliding with Earth usually changes as more and more observations are made by astronomers. When a NEO is first discovered there is a large amount of uncertainty in the path of the object, with more observations the orbit becomes better identified and the chance of an impact usually decreases. In general it takes many weeks for the orbit of a newly discovered NEO to be determined to a high degree of accuracy.
Related Answers
How do we search for NEOs?
Why is follow-up activity required?
|
