Pluto hasn’t completed an orbit around the sun since its discovery. Pluto’s orbit takes about 248 years, and Pluto was discovered in 1930. SOURCE <a rel="noreferrer nofollow noopener" href="https://www.nbcnews.com/id/wbna43730547" target="_blank">https://www.nbcnews.com/id/wbna43730547</a>