4142 Dersu-Uzala

4142 Dersu-Uzala, provisional designation 1981 KE, is a Hungaria asteroid, sizable Mars-crosser and potentially slow rotator from the innermost region of the asteroid belt, approximately 6 kilometers (3.7 miles) in diameter. It was discovered by Czech astronomer Zdeňka Vávrová at Kleť Observatory on 28 May 1981.[1] The rare A-type asteroid has a rotation period of 140 hours.[4] It was named after the Siberian trapper and hunter Dersu Uzala.[1]

4142 Dersu-Uzala
Discovery [1]
Discovered byZ. Vávrová
Discovery siteKleť Obs.
Discovery date28 May 1981
Designations
(4142) Dersu-Uzala
Named after
Dersu Uzala [2]
(Siberian trapper and hunter)
1981 KE · 1970 AB
1982 VB
Mars-crosser [3]
Hungaria [1][4]
Orbital characteristics [3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc48.38 yr (17,672 d)
Aphelion2.2005 AU
Perihelion1.6230 AU
1.9117 AU
Eccentricity0.1510
2.64 yr (965 d)
71.888°
0° 22m 22.44s / day
Inclination26.494°
60.661°
55.384°
Physical characteristics
Mean diameter
6.01±1.81 km[5]
6.02±0.60 km[6]
6.34±0.19 km[7]
140±3 h[8][lower-alpha 1]
0.164[7]
0.30[5]
0.307[6]
SMASS = A [3][9]
Srw [4][10]
13.00[6]
13.1[3][4]
13.42[5]
13.60[7]

    Orbit and characterization

    Dersu-Uzala is a member of the dynamical Hungaria group of asteroids, which form the innermost dense concentration of asteroids in the Solar System. It orbits the Sun in the inner asteroid belt at a distance of 1.6–2.2 AU once every 2 years and 8 months (965 days; semi-major axis of 1.91 AU). Its orbit has an eccentricity of 0.15 and an inclination of 26° with respect to the ecliptic. As its orbit crosses that of Mars at 1.66 AU, it is also a Mars crossing asteroid.[3] The body's observation arc begins with its first observation as 1970 AB at Crimea-Nauchnij in January 1970, or 11 years prior to its official discovery observation at Kleť Observatory.[1]

    Naming

    This minor planet was named after Dersu Uzala, a Siberian trapper and hunter and friend of Russian writer Vladimir Arsenyev, who named the main character of his novel Dersu Uzala after him. The approved naming citation was published by the Minor Planet Center on 6 February 1993 (M.P.C. 21609).[11]

    Physical characteristics

    In the SMASS classification, Dersu-Uzala is an A-type asteroid.[3] It has also been characterized as an Srw-type, a subtype of the stony S-type asteroids.[10]

    Rotation period

    In December 2006, a rotational lightcurve of Dersu-Uzala was obtained from photometric observations by American photometrist Brian Warner at the Palmer Divide Observatory in Colorado. Lightcurve analysis gave a rotation period of 140±3 hours with a brightness amplitude of 0.60 magnitude (U=2).[4][8][lower-alpha 1] Alternative observations gave a period of 71 and 71.2 hours, respectively.[12][13]

    Diameter and albedo

    According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Dersu-Uzala measures 6.01 and 6.34 kilometers in diameter and its surface has an albedo of 0.164 and 0.30, respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a stony asteroid of 0.2 and calculates a diameter of 7.13 kilometers based on an absolute magnitude of 13.1.[4]

    Notes
    1. Lightcurve plot of 4142 Dersu-Uzala, Palmer Divide Observatory, B. D. Warner (2006). Quality code is 3. Summary figures at the LCDB.

    References
    1. "4142 Dersu-Uzala (1981 KE)". Minor Planet Center. Retrieved 8 September 2018.
    2. Schmadel, Lutz D. (2007). "(4142) Dersu-Uzala". Dictionary of Minor Planet Names – (4142) Dersu-Uzala. Springer Berlin Heidelberg. p. 354. doi:10.1007/978-3-540-29925-7_4115. ISBN 978-3-540-00238-3.
    3. "JPL Small-Body Database Browser: 4142 Dersu-Uzala (1981 KE)" (2018-05-24 last obs.). Jet Propulsion Laboratory. Retrieved 8 September 2018.
    4. "LCDB Data for (4142) Dersu-Uzala". Asteroid Lightcurve Database (LCDB). Retrieved 15 June 2017.
    5. Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63.
    6. Alí-Lagoa, V.; Delbo', M. (July 2017). "Sizes and albedos of Mars-crossing asteroids from WISE/NEOWISE data". Astronomy and Astrophysics. 603: 8. arXiv:1705.10263. Bibcode:2017A&A...603A..55A. doi:10.1051/0004-6361/201629917.
    7. 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 8 September 2018. (online, AcuA catalog p. 153)
    8. Warner, Brian D.; Stephens, Robert, D.; Harris, Alan W.; Pravec, Petr (October 2009). "A Re-examination of the Lightcurves for Seven Hungaria Asteroids". The Minor Planet Bulletin. 36 (4): 176–179. Bibcode:2009MPBu...36..176W. ISSN 1052-8091. Retrieved 8 September 2018.
    9. "Asteroid 4142 Dersu-Uzala". Small Bodies Data Ferret. Retrieved 8 September 2018.
    10. Lucas, Michael P.; Emery, Joshua P.; Pinilla-Alonso, Noemi; Lindsay, Sean S.; Lorenzi, Vania (July 2017). "Hungaria asteroid region telescopic spectral survey (HARTSS) I: Stony asteroids abundant in the Hungaria background population". Icarus. 291: 268–287. Bibcode:2017Icar..291..268L. doi:10.1016/j.icarus.2016.11.002. Retrieved 8 September 2018.
    11. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 15 June 2017.
    12. Warner, Brian D. (October 2015). "Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2015 March-June". The Minor Planet Bulletin. 42 (4): 267–276. Bibcode:2015MPBu...42..267W. ISSN 1052-8091. Retrieved 8 September 2018.
    13. Warner, Brian D. (June 2007). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory - September-December 2006". The Minor Planet Bulletin. 34 (2): 32–37. Bibcode:2007MPBu...34...32W. ISSN 1052-8091. Retrieved 8 September 2018.

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