2023 NT1
2023 NT1 is a near-Earth asteroid, approximately 30 meters in diameter, that passed within 1/4 lunar distances on July 13, 2023.

It was not discovered until 2 days after closest approach due to coming from the daylight direction. Future space sentry system, like the ESA's NEOMIR are needed to get a better warning.

Given the future orbital uncertainties as a result of a short 5-day observation arc, it could (statistically speaking) pass close to Earth in 2044, but it is expected to be a very harmless  from Earth in July 2044. The chance of an Earth impact is very low, approximately 1 in 400 thousand.

See also
 List of asteroid close approaches to Earth

References

External links 
 Large asteroid flies close to Earth – and is only spotted days later July 17, 2023
 MPEC 2023-O01 : 2023 NT1 Minor Planet Center
 2023 NT1 JPL

Astronomical objects discovered in 2023
Near-Earth objects in 2023