Named in honor of Heidi Beth Hammel, planetary scientist at the Massachusetts Institute of Technology. An indefatigable observer of the atmospheres of the outer planets, she is best known for her long-term monitoring of Neptune. As an expert in planetary imaging, she was selected as the team leader for the Hubble Space Telescope project to observe the consequences of the July 1994 Jupiter impact by comet D/1993 F2 (Shoemaker-Levy 9). Hammel also devotes substantial effort to public education and is a great communicator of the excitement of planetary science. (M 27125) _ _.