3401 Vanphilos was discovered by the Harvard College Observatory at the Oak Ridge Observatory in August 1981 wherein it was named after Vanessa Hall and Philip Osborne.
3401 Vanphilos, provisional designation 1981 PA, is a stony, eccentric asteroid and sizeable Mars-crosser, approximately 7 kilometers in diameter. It was discovered on 1 August 1981, by and at Harvard's Oak Ridge Observatory (Agassiz Station) in Massachusetts, United States. Harvard College Obs. Oak Ridge Obs.
(Agassiz Stn.) 1 August 1981 (3401) Vanphilos Vanessa Hall
Philip Osborne
(friends of G. V. Williams) 
