379 Huenna

379 Huenna

Orbital diagram
Discovery[1]
Discovered by	Auguste Charlois
Discovery date	8 January 1894
Designations
MPC designation	(379) Huenna
Pronunciation	/hjuːˈɛnə/
Named after	Ven
Alternative designations	1894 AQ; A895 DB; A911 BA; 1948 XM
Minor planet category	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)
Semi-major axis	3.1363 AU (469.18 Gm)
Eccentricity	0.18567
Orbital period (sidereal)	5.55 yr (2028.7 d)
Mean anomaly	126.109°
Mean motion	0° 10^m 38.82^s / day
Inclination	1.6699°
Longitude of ascending node	172.036°
Argument of perihelion	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)×10^17 kg[2][3]
Mean density	0.9±0.1 g/cm^3[2][3] 1.2 g/cm^3[4][5]
Synodic rotation period	14.141 h (0.5892 d)[1]
Geometric albedo	0.0587±0.002[1]
Spectral type	C[3]
Absolute magnitude (H)	8.87[1]

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 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]

Satellite

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]

The orbit of Huenna's satellite

References

1. "JPL Small-Body Database Browser: 379 Huenna (1894 AQ)". Jet Propulsion Laboratory. 2012-01-03 last obs. Archived from the original on 4 June 2019. Retrieved 10 May 2016.
2. Marchis, Franck; P. Descamps; J. Berthier; D. hestroffer; F. vachier; M. Baek; et al. (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. S2CID 119244052.
3. Jim Baer (12 December 2010). "Recent Asteroid Mass Determinations". Personal Website. Archived from the original on 2 July 2013. Retrieved 3 February 2012.
4. Franck Marchis (May 2005). "379 Huenna and S/2003 (379) 1". UCB. Retrieved 3 February 2012.
5. 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 11 November 2005.
6. Peebles, Curtis (2016), Asteroids: a History, Smithsonian, p. 159, ISBN 9781944466046.
7. "IAUC 8182: S/2003 (379) 1; 2003he, 2003hf; C/2003 H1; C/2001 Q4". IAU Central Bureau for Astronomical Telegrams. 15 August 2003. Retrieved 4 February 2012.

External links

• Lightcurve plot of 379 Huenna, Palmer Divide Observatory, B. D. Warner (2010)
• Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• Orbits of Binary Asteroids with Adaptive Optics (VLT images, archived)
• 379 Huenna at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 379 Huenna at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters