8legs: Nasa jet propulsion laboratory (jpl)

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If asteroid YR4 hits our Moon, it'll cause a bright flash and meteors as debris hits Earth, say scientists | BBC Sky at Night Magazine

The study estimates asteroid 2024 YR4 has a 3.8% chance of hitting the Moon, not Earth.
If an impact occurs, a ~1 km crater could form with an infrared glow lasting hours.
The impact could trigger Moonquakes detectable by seismometers on the Moon.
Debris ejected from the Moon could reach Earth and produce meteors visible in the sky.
The flash on the Moon could reach brightness levels similar to magnitude –3 to –5.
Astronomers could observe the event with infrared and other instruments as the crater cools.
A coordinated observing plan could use NASA and international lunar orbiters to study aftermath.
The study maps a timeline from impact to days and years after, including potential lunar meteorites reaching Earth.
The projected event would be a rare scientific opportunity to study lunar material and impacts.
Observational timing would favor the Pacific hemisphere and sites like Mauna Kea for viewing.

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