6189 Völk

6189 Völk
Discovery [1]
Discovered by E. W. Elst
Discovery site La Silla Obs.
Discovery date 2 March 1989
Designations
MPC designation 6189 Völk
Named after
 Elisabeth Völk
(ESO staff member)[2]
1989 EY2 · 1980 TY4
5489 T-2
main-belt · Flora [3]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 42.40 yr (15,487 days)
Aphelion 2.6169 AU
Perihelion 1.9915 AU
2.3042 AU
Eccentricity 0.1357
3.50 yr (1,278 days)
74.219°
0° 16m 54.12s / day
Inclination 5.9396°
245.35°
68.696°
Physical characteristics
Dimensions 3.982±0.156 km[4]
5.17 km (calculated)[3]
2.896±0.001 h[5]
0.4434±0.0789[4]
0.24 (assumed)[3]
S [3][6]
13.6[1][3]
13.5[4]
14.43±0.59[6]

    6189 Völk, provisional designation 1989 EY2, is a stony Flora 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 ESO's La Silla Observatory in northern Chile.[7]

    The S-type asteroid is a member of the Flora family, one of the largest groups of stony asteroids in the main-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 plane of the ecliptic.[1]

    Constructed from photometric observations in September 2015, a rotational light-curve was obtained by American astronomer Robert Stevens 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).[5]

    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] 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.[3] The body's S-type spectrum has also been determined in the large-scale survey performed by Pan-STARRS.[6]

    The minor planet was named for Elisabeth Völk (b. 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]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 6189 Volk (1989 EY2)" (2016-02-24 last obs.). Jet Propulsion Laboratory. Retrieved April 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (6189) Völk. Springer Berlin Heidelberg. p. 516. ISBN 978-3-540-00238-3. Retrieved April 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (6189) Volk". Asteroid Lightcurve Database (LCDB). Retrieved April 2016.
    4. 1 2 3 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 April 2016.
    5. 1 2 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 April 2016.
    6. 1 2 3 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 April 2016.
    7. ↑ "6189 Volk (1989 EY2)". Minor Planet Center. Retrieved April 2016.

    External links


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