6189 Völk

6189 Völk, provisional designation 1989 EY2, is a Vestian asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 2 March 1989, by Belgian astronomer Eric Elst at the La Silla Observatory in northern Chile.[9] It was named for ESO staff member Elisabeth Völk.[2]

6189 Völk
Discovery [1]
Discovered byE. W. Elst
Discovery siteLa Silla Obs.
Discovery date2 March 1989
Designations
(6189) Völk
Named after
Elisabeth Völk
(ESO staff member)[2]
1989 EY2 · 1980 TY4
5489 T-2
main-belt · Vesta [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc43.58 yr (15,919 days)
Aphelion2.6167 AU
Perihelion1.9929 AU
2.3048 AU
Eccentricity0.1353
3.50 yr (1,278 days)
243.46°
0° 16m 54.12s / day
Inclination5.9403°
245.34°
68.562°
Physical characteristics
Dimensions3.982±0.156 km[4][5]
5.17 km (calculated)[6]
2.896±0.001 h[7]
0.24 (assumed)[6]
0.443±0.079[4][5]
S [6][8]
13.6[1][6] · 13.5[4] · 14.43±0.59[8]

    Classification and orbit

    Völk is a stony S-type asteroid and core member of the Vesta family,[3] one of the largest families in the inner asteroid belt. It orbits the Sun at a distance of 2.0–2.6 AU once every 3 years and 6 months (1,278 days). Its orbit has an eccentricity of 0.14 and an inclination of 6° with respect to the ecliptic.[1] The first precovery was taken at Palomar Observatory in 1973, extending the asteroid's observation arc by 16 years prior to its discovery.[9]

    Lightcurve

    In September 2015, a rotational lightcurve was constructed from photometric observations by American astronomer Robert D. Stephens at the Center for Solar System Studies in California. It showed a well-defined rotation period of 2.896±0.001 hours with a brightness amplitude of 0.18 in magnitude (U=3).[7]

    Diameter

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 4.0 kilometers in diameter and its surface has an outstandingly high albedo of 0.44,[4][5] while the Collaborative Asteroid Lightcurve Link (CALL) assumes an albedo of 0.24 – in accordance with the family's largest member and namesake, 8 Flora – and calculates a diameter of 5.2 kilometers.[6] The body's S-type spectrum has also been determined in the large-scale survey performed by Pan-STARRS.[8]

    Naming

    This minor planet was named after Elisabeth Völk (born 1946), administrative staff member at ESO's headquarters in Germany, in charge of the ESO Schmidt plates archive, who became a good friend of the discoverer. The naming was independently suggested by astronomer and author of the Dictionary of Minor Planets, Lutz Schmadel.[2] The approved naming citation was published by the Minor Planet Center on 15 February 1995 (M.P.C. 24766).[10]

    References
    1. "JPL Small-Body Database Browser: 6189 Volk (1989 EY2)" (2017-05-01 last obs.). Jet Propulsion Laboratory. Retrieved 4 July 2017.
    2. Schmadel, Lutz D. (2007). "(6189) Völk". Dictionary of Minor Planet Names – (6189) Völk. Springer Berlin Heidelberg. p. 516. doi:10.1007/978-3-540-29925-7_5706. ISBN 978-3-540-00238-3.
    3. "Asteroid (6189) Volk". AstDyS-2, Asteroids – Dynamic Site. Retrieved 23 July 2018.
    4. Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 14 April 2016.
    5. Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 5 December 2016.
    6. "LCDB Data for (6189) Volk". Asteroid Lightcurve Database (LCDB). Retrieved 14 April 2016.
    7. Stephens, Robert D. (January 2016). "Asteroids Observed from CS3: 2015 July - September". The Minor Planet Bulletin. 43 (1): 52–56. Bibcode:2016MPBu...43...52S. ISSN 1052-8091. Retrieved 14 April 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:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 14 April 2016.
    9. "6189 Volk (1989 EY2)". Minor Planet Center. Retrieved 14 April 2016.
    10. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 2016.

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