(23490) Monikohl = 1991 RK3 Monika Kohl (b. 1944) served as secretary of the documentation department of the Astronomisches Rechen-Institut for more than four decades. She carried out a huge amount of input work for Astronomy and Astrophysics Abstracts. The name was suggested by the first discoverer.
A complete set of naming citations of the numbered minor planets is available in the Dictionary of Minor Planet Names, edited by Lutz Schmadel.