Depends on the orbit. Elon's roadster on its heliocentric orbit has a predicted half-life of 15 million years (1) The moon has been on orbit around the earth f

Depends on the orbit. Elon's roadster on its heliocentric orbit has a predicted half-life of 15 million years (1) The moon has been on orbit around the earth for billions of year and will probably remain on orbit forever (whatever "forever" means). (1) https://www.mdpi.com/2226-4310/5/2/57 https://www.mdpi.com/2226-4310/5/2/57