379 Huenna
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 8 January 1894 |
| Designations | |
|
Named after
|
Ven |
| 1894 AQ; A895 DB; A911 BA; 1948 XM | |
| Main belt (Themis) | |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 122.26 yr (44656 d) |
| Aphelion | 3.7186 AU (556.29 Gm) |
| Perihelion | 2.5540 AU (382.07 Gm) |
| 3.1363 AU (469.18 Gm) | |
| Eccentricity | 0.18567 |
| 5.55 yr (2028.7 d) | |
|
Average orbital speed
|
16.68 km/s |
| 126.109° | |
| 0° 10m 38.82s / day | |
| Inclination | 1.6699° |
| 172.036° | |
| 179.961° | |
| Known satellites | 1 (5.8±1.2 km) |
| Earth MOID | 1.54752 AU (231.506 Gm) |
| Jupiter MOID | 1.71074 AU (255.923 Gm) |
| Jupiter Tisserand parameter | 3.184 |
| Physical characteristics | |
| Dimensions |
92.33±1.7 km (IRAS) 98±3 km |
| Mass | 3.83±0.19×1017 kg |
|
Mean density
|
0.9±0.1 g/cm³ 1.2 g/cm³ |
|
Equatorial surface gravity
|
0.0150 m/s² |
|
Equatorial escape velocity
|
0.0372 km/s |
| 14.141 h (0.5892 d) | |
| 0.0587±0.002 | |
| Temperature | ~159 K |
| C | |
| 8.87 | |
379 Huenna is a large asteroid orbiting in the asteroid belt. It is part of the Themis family, and thus a C-type asteroid and consequently composed mainly of carbonaceous material.
It was discovered by Auguste Charlois on January 8, 1894 in Nice. It is named after the Swedish island of Hven, the site of two observatories.
A satellite, 7 km across and designated S/2003 (379) 1, was discovered on August 14, 2003 by Jean-Luc Margot using the Keck II adaptive optics telescope at Mauna Kea. The moon orbits 3400±11 km away in 80.8±0.36 d with an eccentricity of 0.334±0.075. The system is loosely bound as Huenna has a hill sphere with a radius of about 20,000 km.
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Wikipedia