The orbits of centaurs change from time to time because of interactions with the giant planets. Nessus is thought to have a fairly long orbital half-life of about 4.9 [[Myr]].<ref name="Horner2004a">{{cite journal |last1=Horner |first1=J. |last2=Evans |first2=N. W. |last3=Bailey |first3=M. E. |title=Simulations of the population of Centaurs – I. The bulk statistics |journal=Monthly Notices of the Royal Astronomical Society |date=1 November 2004 |volume=354 |issue=3 |pages=798–810 |doi=10.1111/j.1365-2966.2004.08240.x |s2cid=16002759 |url=https://doi.org/10.1111/j.1365-2966.2004.08240.x |accessdate=24 June 2022 |issn=0035-8711}}</ref> | The orbits of centaurs change from time to time because of interactions with the giant planets. Nessus is thought to have a fairly long orbital half-life of about 4.9 [[Myr]].<ref name="Horner2004a">{{cite journal |last1=Horner |first1=J. |last2=Evans |first2=N. W. |last3=Bailey |first3=M. E. |title=Simulations of the population of Centaurs – I. The bulk statistics |journal=Monthly Notices of the Royal Astronomical Society |date=1 November 2004 |volume=354 |issue=3 |pages=798–810 |doi=10.1111/j.1365-2966.2004.08240.x |s2cid=16002759 |url=https://doi.org/10.1111/j.1365-2966.2004.08240.x |accessdate=24 June 2022 |issn=0035-8711}}</ref> |