32532 Thereus
32532 Thereus (/θɪˈriːəs/; provisional designation 2001 PT13) is a centaur from the outer Solar System, approximately 80 kilometers (50 miles) in diameter. It was discovered on 9 August 2001, by astronomers of the Near-Earth Asteroid Tracking program at the Palomar Observatory in California, United States. This minor planet was named for the phrase thēreios bia 'beastly strength', used to describe centaurs in Greek mythology.
| Discovery | |
|---|---|
| Discovered by | NEAT |
| Discovery site | Palomar Obs. |
| Discovery date | 9 August 2001 |
| Designations | |
| (32532) Thereus | |
| Pronunciation | /θɪˈriːəs/ |
Named after | θήρειος βία thēreios bia |
| 2001 PT13 · 1995 MM6 1999 NE2 | |
| centaur · distant | |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 1 | |
| Observation arc | 21.57 yr (7,879 days) |
| Aphelion | 12.745 AU |
| Perihelion | 8.5345 AU |
| 10.640 AU | |
| Eccentricity | 0.1979 |
| 34.70 yr (12,676 days) | |
| 192.91° | |
| 0° 1m 42.24s / day | |
| Inclination | 20.353° |
| 205.33° | |
| 86.322° | |
| Physical characteristics | |
Mean diameter | 62±3 km 77.19 km (derived) 80±5 km 86.500±1.900 km |
| 8.30 h 8.3091 h 8.335 h 8.338±0.002 h 8.3386±0.0006 h | |
| 0.057 (assumed) 0.059±0.013 0.083±0.016 0.0975±0.0125 | |
| BR B–V = 0.770±0.020 B–V = 0.810±0.050 B–V = 0.763±0.072 V–R = 0.490±0.010 V–R = 0.501±0.016 V–I = 0.940±0.010 V–I = 0.900±0.130 V–I = 0.917±0.035 | |
| 9.1 · 9.29 · 9.32 · 9.36 · 9.365±0.038 (R) · 9.40±0.16 · 9.42±0.01 | |
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