2067 Aksnes

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2067 Aksnes
Discovery [1]
Discovered by Y. Väisälä
Discovery site Turku Obs.
Discovery date 23 February 1936
Designations
MPC designation 2067 Aksnes
Named after
Kaare Aksnes (astronomer)[2]
1936 DD · 1951 AG
1965 UV · 1971 QH2
1973 UR2 · 1975 BD1
main-belt · Hilda[3]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 80.30 yr (29,331 days)
Aphelion 4.6834 AU
Perihelion 3.2439 AU
3.9637 AU
Eccentricity 0.1816
7.89 yr (2,882 days)
166.25°
0° 7m 29.64s / day
Inclination 3.0798°
150.24°
297.37°
Jupiter MOID 0.5878 AU
Jupiter Tisserand parameter 3.0270
Physical characteristics
Dimensions 42.53 km (derived)[3]
42.59±2.0 km (IRAS:4)[4]
46.003±0.761 km[1][5]
49.26±1.96 km[6]
17.75 h[7]
0.049±0.004[6]
0.05±0.01[3][5]
0.054±0.003[1][5]
0.0562 (derived)[3]
0.0626±0.006 (IRAS:4)[4]
B–V = 0.658[1]
U–B = 0.240[1]
Tholen = P[1] · P[3] · D[5]
10.48[6] · 10.48 (IRAS:4)[1][4] · 10.55±0.24[8] · 10.60[3][7]

2067 Aksnes, provisional designation 1936 DD, is a rare-type Hildian asteroid from the outermost region of the asteroid belt, approximately 44 kilometers in diameter. It was discovered on 23 February 1936, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland.[9]

The dark and reddish asteroid is a member of the Hilda family, the outermost orbital group of asteroids in the main-belt, that are thought to have originated from the Kuiper belt. It orbits the Sun at a distance of 3.2–4.7 AU once every 7 years and 11 months (2,882 days). Its orbit has an eccentricity of 0.18 and an inclination of 3° with respect to the ecliptic.[1] The asteroid's observation arc begins on its discovery night at Turku, the first used observation.[9] As all Hildian asteroids orbit in a 3:2 orbital resonance with the gas giant Jupiter, meaning that for every 2 orbits Jupiter completes around the Sun, they will complete 3 orbits,[1] this asteroid's orbit does not cross the path of any of the planets and therefore it will not be pulled out of orbit by Jupiter's gravitational field. As a result of this, it is likely that the asteroid will remain in a stable orbit for thousands of years.

It is classified as a rare P-type and D-type asteroid on the Tholen taxonomic scheme and by the Wide-field Infrared Survey Explorer (WISE) with its subsequent NEOWISE mission, respectively.[5] Of either type only a few dozens bodies are currently known to exist in the Tholen and SMASSII taxonomy.[10][11]

During a photometric survey of Hildian asteroids in the 1990s, a rotational light-curve was obtained for this asteroid by Swedish, German and Italian observatories . The light-curve gave a rotation period of 17.75 hours with a brightness variation of 0.24 in magnitude (U=2).[7]

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's WISE telescope and its NEOWISE mission, the asteroid measures between 42.5 and 49.3 kilometers in diameter and its surface has a low albedo between 0.049 and 0.063.[1][4][5][6] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.056 and a diameter of 42.5 kilometers, based on an absolute magnitude of 10.6.[3]

The minor planet was named in honor of Norwegian Kaare Aksnes (b. 1938), a celestial mechanician who worked at the Smithsonian Astrophysical Observatory in the 1970s. He is known for his studies of artificial and natural satellites, in particular for his research on the Galilean satellites, the four largest moons of Jupiter, namely Io, Europa, Ganymede, and Callisto.[2] Naming citation was published before November 1977 (M.P.C. 4482).[12]

References[edit]

  1. ^ a b c d e f g h i j k "JPL Small-Body Database Browser: 2067 Aksnes (1936 DD)" (2016-06-13 last obs.). Jet Propulsion Laboratory. Retrieved 7 December 2016. 
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2067) Aksnes. Springer Berlin Heidelberg. p. 167. ISBN 978-3-540-00238-3. Retrieved 29 August 2016. 
  3. ^ a b c d e f g "LCDB Data for (2067) Aksnes". Asteroid Lightcurve Database (LCDB). Retrieved 29 August 2016. 
  4. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved 29 August 2016. 
  5. ^ a b c d e f Grav, T.; Mainzer, A. K.; Bauer, J.; Masiero, J.; Spahr, T.; McMillan, R. S.; Walker, R.; Cutri, R.; Wright, E.; Eisenhardt, P. R.; Blauvelt, E.; DeBaun, E.; Elsbury, D.; Gautier, T.; Gomillion, S.; Hand, E.; Wilkins, A. (January 2012). "WISE/NEOWISE Observations of the Hilda Population: Preliminary Results". The Astrophysical Journal. 744 (2): 15. arXiv:1110.0283Freely accessible. Bibcode:2012ApJ...744..197G. doi:10.1088/0004-637X/744/2/197. Retrieved 29 August 2016. 
  6. ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 29 August 2016. 
  7. ^ a b c Dahlgren, M.; Lahulla, J. F.; Lagerkvist, C.-I.; Lagerros, J.; Mottola, S.; Erikson, A.; Gonano-Beurer, M.; Di Martino, M. (June 1998). "A Study of Hilda Asteroids. V. Lightcurves of 47 Hilda Asteroids". Icarus. 133 (2): 247–285. Bibcode:1998Icar..133..247D. doi:10.1006/icar.1998.5919. Retrieved 29 August 2016. 
  8. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 29 August 2016. 
  9. ^ a b "2067 Aksnes (1936 DD)". Minor Planet Center. Retrieved 29 August 2016. 
  10. ^ "JPL Small-Body Database Search Engine: spec. type = P (Tholen)". JPL Solar System Dynamics. Retrieved 2015-06-17. 
  11. ^ "JPL Small-Body Database Search Engine: spec. type = D (Tholen) or spec. type = D (SMASSII)". JPL Solar System Dynamics. Retrieved 9 August 2016. 
  12. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 29 August 2016. 

External links[edit]