http://comet-seki.net/Syouwakusei.html

(43803) Wakakinosakura = 1991 RH2 = 1999 CN41
Discovered at Geisei on 1991-09-07 by T. Seki.

Wakakinosakura is a kind of wild cherry tree discovered in 1889 by Japanese botanist Tomitaro Makino at Ogawa Castle in his hometown of Sakawa, Kochi prefecture. In 2008 seeds of the tree were carried to the Japanese module Kibo on the ISS and the cherry trees grown from the returned seeds are affectionately called Uchu-Zakura (“space cherry blossoms”).
[Ref: WGSBN Bull. 3, #7, 13]