There's a lot of hoopla online about asteroid 2021 LD6's close approach to Earth. Will be close enough and large enough to be seen with the naked eye?
No, at its brightest in June 2021, 2021 LD6 [MPC, JPL] was apparent magnitude 20-21, well beyond the reach of most amateur telescopes. At absolute magnitude H=27.3, it's not very large, and at 10.5 times the lunar distance, it wasn't very close.
Gideon van Buitenen keeps a list of near-Earth objects (NEOs) which will appear brighter than magnitude 14 sometime in the next 12 months. Naked-eye NEOs are quite rare.