Named in honor of Kousuke Hayashi (1934– ), currently serving in the Exhibit Planning and Astronomy Section of the Sapporo Youth Science Museum, and Chairman of the Japan Planetarium Research Association since 1990. He served at the Sapporo City Astronomical Observatory for 20 years and has been a central figure in providing astronomical information to the public. One of his greatest achievements was the invention of a mobile observatory. (M 20521) _ _.