Huenna (minor planet designation: 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.
Discovery[1] | |
---|---|
Discovered by | Auguste Charlois |
Discovery date | 8 January 1894 |
Designations | |
(379) Huenna | |
Pronunciation | /hjuːˈɛnə/ |
Named after | Ven |
1894 AQ; A895 DB; A911 BA; 1948 XM | |
Main belt (Themis) | |
Orbital characteristics[1] | |
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) | |
126.109° | |
0° 10m 38.82s / day | |
Inclination | 1.6699° |
172.036° | |
179.961° | |
Known satellites | 1 (5.8±1.2 km)[2] |
Physical characteristics | |
Mean diameter | 92.33±1.7 km (IRAS)[1] 98±3 km[2] |
Mass | (3.83±0.19)×1017 kg[2][3] |
Mean density | 0.9±0.1 g/cm3[2][3] 1.2 g/cm3[4][5] |
14.141 h (0.5892 d)[1] | |
0.0587±0.002[1] | |
C[3] | |
8.87[1] | |
It was discovered by Auguste Charlois on 8 January 1894 in Nice. It is the Latin name for the Swedish island of Ven, the site of two observatories. This island is where Tycho Brahe built his observatory.[6]
A satellite, 7 km across and designated S/2003 (379) 1, was discovered on 14 August 2003 by Jean-Luc Margot using the Keck II adaptive optics telescope at Mauna Kea.[7] The moon orbits 3400±11 km away in 80.8±0.36 d with an eccentricity of 0.334±0.075.[5] The system is loosely bound[4] as Huenna has a Hill sphere with a radius of about 20,000 km.[2]