>>509354092
>Can you imagine is a 20km wide object at this speed hit mars?
Assuming a 20km diameter and ~85kps from the simulation I linked above, and the default for this calculator of 2500 kg/m3

Total equivalent energy is:
9,041,589,755 Megatons of TNT
9 Petatons
Tsar Bomba, the biggest nuclear detonation on Earth, was 50 Megatons

https://rechneronline.de/planets/asteroid-impact.php