  Among the nearly 30,000 known near-Earth asteroids (NEAs), only tens of them
possess Earth co-orbital characteristics with semi-major axes $\sim$1 au. In
particular, 469219 Kamo`oalewa (2016 HO3), upcoming target of China's Tianwen-2
asteroid sampling mission, exhibits a meta-stable 1:1 mean-motion resonance
with Earth. Intriguingly, recent ground-based observations show that
Kamo`oalewa has spectroscopic characteristics similar to space-weathered lunar
silicates, hinting at a lunar origin instead of an asteroidal one like the vast
majority of NEAs. Here we use numerical simulations to demonstrate that
Kamo`oalewa's physical and orbital properties are compatible with a fragment
from a crater larger than 10--20 km formed on the Moon in the last few million
years. The impact could have ejected sufficiently large fragments into
heliocentric orbits, some of which could be transferred to Earth 1:1 resonance
and persist today. This leads us to suggest the young lunar crater Giordano
Bruno (22 km diameter, 1--10 Ma age) as the most likely source, linking a
specific asteroid in space to its source crater on the Moon. The hypothesis
will be tested by the Tianwen-2 mission when it returns a sample of
Kamo`oalewa. And the upcoming NEO Surveyor mission will possibly help us to
identify such a lunar-derived NEA population.
