379 Huenna
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| Discovery[1] | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | January 8, 1894 |
| Designations | |
| Named after | Ven |
| Alternative names | 1894 AQ; A895 DB; A911 BA; 1948 XM |
| Minor planet category | Main belt (Themis) |
| Orbital characteristics | |
| Epoch November 26, 2005 (JD 2453700.5) | |
| Aphelion | 3.729 AU (557.820 Gm) |
| Perihelion | 2.531 AU (378.674 Gm) |
| Semi-major axis | 3.130 AU (468.247 Gm) |
| Eccentricity | 0.191 |
| Orbital period | 5.54 a (2022.660 d) |
| Average orbital speed | 16.68 km/s |
| Mean anomaly | 153.439° |
| Inclination | 1.669° |
| Longitude of ascending node | 172.279° |
| Argument of perihelion | 180.073° |
| Known satellites | 1 (5.8±1.2 km)[2] |
| Physical characteristics | |
| Dimensions |
92.3±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] |
| Equatorial surface gravity | 0.0150 m/s² |
| Escape velocity | 0.0372 km/s |
| Rotation period | 0.2926 d (7.022 h)[1] |
| Albedo | 0.06[1] |
| Temperature | ~159 K |
| Spectral type | C[3] |
| Absolute magnitude (H) | 8.87[1] |
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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.[6] 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]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: 379 Huenna (1894 AQ)". Jet Propulsion Laboratory. 2012-01-03 last obs. Retrieved 2012-02-03.
- ↑ 2.0 2.1 2.2 2.3 2.4 Marchis, Franck; P. Descamps, J. Berthier, D. hestroffer, F. vachier, M. Baek, A. Harris, D. Nesvorny (2008). "Main Belt Binary Asteroidal Systems With Eccentric Mutual Orbits". Icarus 195 (1): 295–316. arXiv:0804.1385. Bibcode:2008Icar..195..295M. doi:10.1016/j.icarus.2007.12.010.
- ↑ 3.0 3.1 3.2 Jim Baer (12 December 2010). "Recent Asteroid Mass Determinations". Personal Website. Retrieved 2012-02-03.
- ↑ 4.0 4.1 Franck Marchis (May 2005). "379 Huenna and S/2003 (379) 1". UCB. Retrieved 2012-02-03.
- ↑ 5.0 5.1 Wm. Robert Johnston (25 November 2008). "(379) Huenna and S/2003 (379) 1". Johnston's Archive. Archived from the original on 11 December 2005. Retrieved 2005-11-11.
- ↑ "IAUC 8182: S/2003 (379) 1; 2003he, 2003hf; C/2003 H1; C/2001 Q4". IAU Central Bureau for Astronomical Telegrams. 2003-08-15. Retrieved 2012-02-04.
External links
- Orbital simulation from JPL (Java) / Ephemeris
- Orbits of Binary Asteroids with Adaptive Optics (VLT images)
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