426 Hippo
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| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | August 25, 1897 |
| Designations | |
| Named after | Hippo Regius |
| Alternative names | 1897 DH |
| Minor planet category | Main belt |
| Orbital characteristics | |
 | |
| Epoch November 4, 2013 | |
| Aphelion | 3.1880 AU (476.92 Gm) |
| Perihelion | 2.5906 AU (387.55 Gm) |
| Semi-major axis | 2.8893 AU (432.23 Gm) |
| Eccentricity | 0.1034 |
| Orbital period | 4.91 yr |
| Average orbital speed | 17.53 km/s |
| Mean anomaly | 47.4380° |
| Inclination | 19.4779° |
| Longitude of ascending node | 311.434° |
| Argument of perihelion | 221.982° |
| Proper orbital elements | |
| Proper mean motion | 0.200682 deg / yr |
| Proper orbital period |
1793.88286 yr (655215.714 d) |
| Physical characteristics | |
| Dimensions | 127.1 km |
| Rotation period | 1.4292 Earth days |
| Albedo | 0.0469 |
| Temperature | 154-171 K |
| Spectral type | F |
| Absolute magnitude (H) | 8.42 |
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426 Hippo is a rather large main-belt asteroid. It was discovered by Auguste Charlois on August 25, 1897, in Nice. In the 22nd century, it will come closer than 6,000,000 km (0.04 AU) to the larger asteroids 65 Cybele and 511 Davida.
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