388 Charybdis
388 Charybdis (/kəˈrɪbdɪs/, prov. designation: A894 ED or 1894 BA) is a very large background asteroid, approximately 125 kilometers (78 miles) in diameter, that is located the outer region of the asteroid belt. It was discovered by French astronomer Auguste Charlois at the Nice Observatory on 7 March 1894. The carbonaceous C-type asteroid has a rotation period of 9.5 hours. It is probably named after Charybdis, a sea monster in Greek mythology.
Modelled shape of Charybdis | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 7 March 1894 |
| Designations | |
MPC designation | (388) Charybdis |
| Pronunciation | /kəˈrɪbdɪs/ |
Named after | Charybdis |
Alternative designations | 1894 BA |
Minor planet category | Main belt |
| Adjectives | Charybdian /kəˈrɪbdiən/ |
| Symbol | |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 122.09 yr (44595 d) |
| Aphelion | 3.20025 AU (478.751 Gm) |
| Perihelion | 2.81022 AU (420.403 Gm) |
Semi-major axis | 3.00524 AU (449.578 Gm) |
| Eccentricity | 0.064892 |
Orbital period (sidereal) | 5.21 yr (1902.9 d) |
Mean anomaly | 10.9926° |
Mean motion | 0° 11m 21.066s / day |
| Inclination | 6.44575° |
Longitude of ascending node | 354.285° |
| 333.004° | |
| Physical characteristics | |
Mean diameter | 125.754±1.887 km |
Synodic rotation period | 9.516 h (0.3965 d) |
| 0.0506±0.007 | |
| C | |
| 8.57 | |
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