_Hippo.png) Modelled shape ofHippo from itslightcurve | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 25 August 1897 |
| Designations | |
| (426) Hippo | |
| Pronunciation | /ˈhɪpoʊ/ |
Named after | Hippo Regius (ἹππώνHippōn) |
| 1897 DH | |
| Main belt | |
| Adjectives | Hipponian/hɪˈpoʊniən/[1] |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 112.19 yr (40977 d) |
| Aphelion | 3.1893 AU (477.11 Gm) |
| Perihelion | 2.5893 AU (387.35 Gm) |
| 2.8893 AU (432.23 Gm) | |
| Eccentricity | 0.10384 |
| 4.91yr (1793.8d) | |
| 247.692° | |
| 0° 12m 2.484s / day | |
| Inclination | 19.4771° |
| 311.419° | |
| 222.319° | |
| Proper orbital elements[3] | |
Propersemi-major axis | 2.88928 AU |
Propereccentricity | 0.179526 |
Properinclination | 20.3798° |
Propermean motion | 73.2862 deg / yr |
Properorbital period | 4.91225yr (1794.199d) |
Precession ofperihelion | 32.8357 arcsec / yr |
Precession of theascending node | −59.8571 arcsec / yr |
| Physical characteristics | |
| Dimensions | 127.10±3.5 km[2] |
| 34.3 h (1.43 d) | |
| 0.0469±0.003[2] | |
| Temperature | 154-171 K |
| F | |
| 8.42[2] | |
426 Hippo is a rather largemain-beltasteroid. It was discovered byAuguste Charlois on August 25, 1897, inNice. In the 22nd century, it will come closer than 6,000,000 km (0.04 AU) to the larger asteroids65 Cybele and511 Davida.[2]
