3687 Dzus

3687 Dzus, provisional designation A908 TC, is a carbonaceous asteroid from the central region of the asteroid belt, approximately 31 kilometers in diameter. It was discovered by German astronomer August Kopff at Heidelberg-Königstuhl State Observatory on 7 October 1908.[10]

3687 Dzus
Discovery [1]
Discovered byA. Kopff
Discovery siteHeidelberg Obs.
Discovery date7 October 1908
Designations
(3687) Dzus
Named after
Paul K. Dzus
(MPC volunteer)[2]
A908 TC · 1952 HM3
1970 GD2 · 1980 TO8
1980 TX · 1984 NC
main-belt · (middle)
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc108.33 yr (39,567 days)
Aphelion3.2735 AU
Perihelion2.1814 AU
2.7275 AU
Eccentricity0.2002
4.50 yr (1,645 days)
84.307°
0° 13m 7.68s / day
Inclination15.798°
224.89°
113.79°
Physical characteristics
Dimensions28.61±2.2 km[3]
30.932±0.250 km[4]
32.36±0.40 km[5]
34.481±0.343 km[6]
7.44±0.01 h[7]
0.0373±0.0070[6]
0.043±0.001[5]
0.046±0.005[4]
0.0542±0.009[3]
SMASS = Ch [1] · C [8]
11.4[1] · 11.5[3][5][6][8] · 11.57±0.19[9]

    Orbit and classification

    Dzus orbits the Sun in the central main-belt at a distance of 2.2–3.3 AU once every 4 years and 6 months (1,645 days). Its orbit has an eccentricity of 0.20 and an inclination of 16° with respect to the ecliptic.[1] As no precoveries were taken, the asteroid's observation arc begins with its discovery observation in 1908.[10]

    Physical characteristics

    The C-type asteroid is characterized as a Ch subtype in the SMASS classification.[1]

    Diameter and albedo

    According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Dzus measures between 28.6 and 34.5 kilometers in diameter and its surface has an albedo between 0.038 and 0.054.[3][4][5][6] The Collaborative Asteroid Lightcurve Link agrees with the results obtained by IRAS; that is an albedo of 0.038 and a diameter of 28.6 kilometers, based on an absolute magnitude of 11.5.[8]

    Rotation period

    A fragmentary lightcurve of Dzus was obtained from photometric observations made by Robert Stephens at the Santana Observatory (646) in Rancho Cucamonga, California, during April to June 2002. It showed a rotation period of 7.44±0.01 hours with a brightness variation of 0.25±0.04 in magnitude during each rotation (U=1).[7]

    Naming

    This minor planet was named by Brian Geoffrey Marsden, long-time director of the Minor Planet Center (MPC), in honor of Paul K. Dzus (b. 1969) in appreciation of his helpful assistance since October 1987, much of the time as a volunteer.[2] The official naming citation was published by the MPC on 23 December 1988 (M.P.C. 14029).[11]

    References
    1. "JPL Small-Body Database Browser: 3687 Dzus (A908 TC)" (2017-02-04 last obs.). Jet Propulsion Laboratory. Retrieved 19 June 2017.
    2. Schmadel, Lutz D. (2007). "(3687) Dzus". Dictionary of Minor Planet Names – (3687) Dzus. Springer Berlin Heidelberg. p. 310. doi:10.1007/978-3-540-29925-7_3685. ISBN 978-3-540-00238-3.
    3. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
    4. Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 14 September 2016.
    5. 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 17 October 2019. (online, AcuA catalog p. 153)
    6. 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.
    7. Stephens, R. D. (December 2002), "Photometry of 769 Tatjana, 818 Kapteyna, 1922 Zulu, and 3687 Dzus", The Minor Planet Bulletin, 29: 72, Bibcode:2002MPBu...29...72S
    8. "LCDB Data for (3687) Dzus". Asteroid Lightcurve Database (LCDB). Retrieved 30 October 2016.
    9. 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 30 October 2016.
    10. "3687 Dzus (A908 TC)". Minor Planet Center. Retrieved 30 October 2016.
    11. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 30 October 2016.

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