As for what a quasisatellite *is* - it's an object that is technically not in orbit of a planet, but has been forced into an orbit around the planet's star with the same period as the planet's orbit by the planet's gravity, thus accompanying the planet in its orbit but not technically orbiting it

EARTH'S NEW NEIGHBOR: ASTEROID OR MOON-LIKE COMPANION?

Asteroid 2016 HO3 is a quasi-satellite, staying near Earth for hundreds of years. Learn why it's not a true moon and its unique orbit.

['#Asteroid2016HO3', '#QuasiSatellite',...

https://newsletter.tf/earth-quasi-moon-2016-ho3-stays-centuries/

Earth Has Picked Up a New 'Quasi-Satellite' – But It Won't Be Here Long #Science #Space #PlanetaryScience #QuasiSatellite #Astrophysics

Earth Has Another Quasi-Satellite: The Asteroid Arjuna 2025 PN7 #Science #Space #AsteroidScience #Asteroids #QuasiSatellite #SpaceExploration