Far Far Out - 2018 AG37 | trans-Neptunian Object Song

The video introduces 2018 AG 37, a Trans Neptunian object, discovered in 2018 by astronomers at the Mauna Kea Observatories. It is currently the farthest known object in the solar system, located 148 astronomical units from the Sun. The object is faint and can only be observed with the largest telescopes. Its estimated size is about 250 miles wide, possibly qualifying it as a dwarf planet. The video concludes with the object's nickname, 'Far, far, far out', due to its distance.

What is the apparent magnitude of 2018 AG 37, and what does it imply about its visibility?

What nickname does the object suggest for itself and why?