The Phantom Planet (1961)

After an invisible asteroid draws an astronaut and his ship to its surface, he is miniaturized by the phantom planet's exotic atmosphere.

Director:

William Marshall

Writers:

William Telaak (screenplay), Fred De Gorter (screenplay), 3 more credits »

Stars:

Dean Fredericks, Coleen Gray, Anthony Dexter |  via IMDB 

https://archive.org/details/ThePhantomPlanet