It was discovered on 5 October 1994, by German astronomer Freimut Börngen at the Karl Schwarzschild Observatory in Tautenburg, eastern Germany.
It was taken at the Siding Spring Observatory in September 1990, more than 4 years prior to its official discovery observation at Tautenburg.
[5] Since asteroids in the inner main-belt are often of a brighter silicaceous – rather than of a darker carbonaceous composition, with higher albedos, typically around 0.20, the asteroid's diameter might be on the lower end of NASA's published conversion table, as the lower the reflectivity (albedo), the larger the body's diameter for a given absolute magnitude.
[5] As of 2018, Rosenthal's effective size, shape, pole, spectral type and composition, as well as its albedo and rotation period remain unknown.
[2][6] This minor planet was named in honour of German radio and TV host Hans Rosenthal (1925–1987), a German Jew who survived the Holocaust as a boy inside Germany and became one of the country's most popular TV show masters ever in the early 1980s.