Asteroid 1999 KW4 will pass by Earth on May 25, 23:05 UTC at a distance
of 5,182,015 kilometers.
The 1.5m km diamater asteroid has its own moon, that is, it is a binary system.
It is expected to reach mag 12 and might be visually observable in as little as an 8".
It will be up in Puppis.
Story here :-
https://www.cnet.com/news/walnut-ast...-its-own-moon/
More here :-
https://earthsky.org/space/double-as...st-may-25-2019