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Published on 8 April 2021
elsa's Personal Gallery
How are they predicted?
Predict the impact of meteorites on the Earth.
They detect NEO
NASA studies each NEO
Is it a PHA?
How can we know if an asteroid is a PHA or not?
A PHA passes through the Earth's orbit near 0,5 astronomical units
30-50 meters wide
Some orbits are far away or they change. They can't be predicted until they are near the Earth's orbit.
How is it made?
They have different and irregular orbits and shapes