426 Hippo
Main-belt asteroid / From Wikipedia, the free encyclopedia
Hippo (minor planet designation: 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.[2]
Quick Facts Discovery, Discovered by ...
Discovery | |
---|---|
Discovered by | Auguste Charlois |
Discovery date | 25 August 1897 |
Designations | |
(426) Hippo | |
Pronunciation | /ˈhɪpoʊ/ |
Named after | Hippo Regius (Ἱππών Hippōn) |
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 |
4.91 yr (1793.8 d) | |
247.692° | |
0° 12m 2.484s / day | |
Inclination | 19.4771° |
311.419° | |
222.319° | |
Proper orbital elements[3] | |
Proper semi-major axis | 2.88928 AU |
Proper eccentricity | 0.179526 |
Proper inclination | 20.3798° |
Proper mean motion | 73.2862 deg / yr |
Proper orbital period | 4.91225 yr (1794.199 d) |
Precession of perihelion | 32.8357 arcsec / yr |
Precession of the ascending 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] | |
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