(19633) Rusjan = 1999 RX42
Edvard Rusjan (1886-1911) was a pioneer Slovenian aircraft designer and
pilot who performed his first fully controllable flight on 1909 Nov. 25 with
an EDA I aircraft. He died after his aircraft crashed in Belgrade on
1911 Jan. 9.
A complete set of naming citations of the numbered minor planets is available in the Dictionary of Minor Planet Names, edited by Lutz Schmadel.