¹ Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218, USA
² Steward Observatory, 933 N. Cherry Ave., The University of Arizona, Tucson, AZ 85721, USA
³ Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117, Heidelberg, Germany
⁴ Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
⁵ Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA
⁶ National Optical Astronomy Observatory, Tucson, AZ, 85719, USA
⁷ Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA
⁸ Centro de Radioastronomía y Astrofísica, UNAM, Morelia, Michoacán, México
⁹ Department of Physics and Astronomy, University of Toledo, Toledo, OH 43606, USA
¹⁰ National Solar Observatory, Tucson, AZ 85719, USA
¹¹ Visiting Astronomer at the Infrared Telescope Facility, which is operated by the University of Hawaii under Cooperative Agreement no. NCC 5-538 with the National Aeronautics and Space Administration, Science Mission Directorate, Planetary Astronomy Program.