379 Huenna

Main-belt asteroid

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° 10m 38.82s / 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)×1017 kg[2][3]

Mean density

| 0.9±0.1 g/cm3[2][3]
1.2 g/cm3[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]

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.

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[edit]

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[edit]

1. ^ a b c d e f "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. ^ a b c d e 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. ^ a b c Jim Baer (12 December 2010). "Recent Asteroid Mass Determinations". Personal Website. Archived from the original on 2 July 2013. Retrieved 3 February 2012.
4. ^ a b Franck Marchis (May 2005). "379 Huenna and S/2003 (379) 1". UCB. Retrieved 3 February 2012.
5. ^ a b 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[edit]

* 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 diagram * Orbital elements * Physical parameters

* v
* t
* e

Minor planets navigator

* 378 Holmia
* 379 Huenna
* 380 Fiducia

* v
* t
* e

Small Solar System bodies

Minor planets|

* Designation
* Groups
* List
* Moon
* Meanings of names

Asteroid|

* Active
* Aten asteroid
* Asteroid belt
* Family
* Jupiter trojan
* Near-Earth
* Spectral types

Distant minor planet|

* Cis-Neptunian object
* Centaur
* Neptune trojan
* Damocloid
* Trans-Neptunian object
* Detached
* Kuiper belt
* Oort cloud
* Scattered disc

Comets|

* Extinct
* Great
* Halley-type
* Hyperbolic
* Long-period
* Lost
* Near-parabolic
* Periodic
* Sungrazing

Other|

* Cosmic dust
* Meteoroids
* Space debris

*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template