Physical observations of (5145) Pholus |
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| Institution: | 1. NASA/Goddard Space Flight Center, 8800 Greenbelt Rd, Greenbelt, MD 20771, USA;2. Department of Physics & Astronomy MS: 3F3, George Mason University, 4400 University Drive, Fairfax, VA 22030, USA;3. Department of Astronomy, University of Maryland, Physical Sciences Complex, College Park, MD 20742 USA;4. Physics Institute: Space Research & Planetary Sciences, University of Bern, Sidlerstrasse 5, Bern 3012, Switzerland;1. Institute of Astronomy, V.N. Karazin Kharkiv National University, 35 Sumska Str., 61022 Kharkiv, Ukraine;2. LESIA, Observatoire de Paris, PSL Research University, CNRS, Univ. Paris Diderot, Sorbonne Paris Cité, UPMC Univ., Paris 06, Sorbonne Universités, 5 Place J. Janssen, Meudon Pricipal Cedex 92195, France;3. INAF – Oss. Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Firenze, Italy;4. CASLEO and San Juan National University, Av. España sur 1512, J5402DSP San Juan, Argentina;5. INAF – Oss. Astrofisico di Torino, via Osservatorio 20, I-10025 Pino Torinese, Italy;6. Crimean Astrophysical Observatory, 98409 Nauchny, Crimea |
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| Abstract: | We present physical measurements of the newly discovered asteroid, (5145) Pholus, based on seven nights of photometric observations. These observations determine an unambiguous lightcurve period of 9.9825 ± 0.0040 hr with a peak-to-peak amplitude of 0.15 mag. We also report a rotationally independent color of (V ? R) = 0.810 ± 0.006 (Kron-Cousins R). The standard IAU two parameter fit versus solar phase angle yields HV = 7.645 ± 0.011 and GV = 0.16 ± 0.08. Except for its color and orbit, (5145) Pholus exhibits normal asteroidal properties. |
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