Asteroid 128523, Johnmuir, was discovered on August 11, 2004 by R. E. Jones at the Francisquito Observatory in Santa Clarita, California. It has a period of 3 years, 268 days.
It was named for the great (Scottish-born) American conservationist John Muir (1838-1914), who came up with the concept of national parks to protect and preserve wild places and helped found the Sierra Club.
John Muir
The meaning of asteroid Johnmuir seems to be: what is natural or comes naturally, preserving this; possibly, environmentalism, appreciation for pristine nature.