1734 Zhongolovich

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1734 Zhongolovich
Discovery [1]
Discovered by G. Neujmin
Discovery site Simeiz Obs.
Discovery date 11 October 1928
MPC designation (1734) Zhongolovich
Named after
Ivan Danilovich Zhongolovich
(Russian geodesist, ITA)[2]
1928 TJ · 1937 RO
1942 XQ · 1951 RM1
1965 UG
main-belt · (middle)[3]
Dora familyDora [4][5]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 88.43 yr (32,298 days)
Aphelion 3.4186 AU
Perihelion 2.1341 AU
2.7763 AU
Eccentricity 0.2313
4.63 yr (1,690 days)
0° 12m 47.16s / day
Inclination 8.3467°
Physical characteristics
Dimensions 25.620±0.113 km[6]
28.47 (IRAS:16) km[3][8]
28.67±10.07 km[9]
33.04±0.71 km[10]
7.171±0.004 h[11]
0.0456 (IRAS:16)[3][8]
SMASS = Ch [1] · C[3][12]
11.68±0.38[12] · 11.7[1][3][7][10] · 11.74[9]

1734 Zhongolovich, provisional designation 1928 TJ, is a carbonaceous Dorian asteroid from the central region of the asteroid belt, approximately 28 kilometers in diameter.

It was discovered on 11 October 1928, by Russian astronomer Grigory Neujmin at Simeiz Observatory on the Crimean peninsula.[13] It was later named after Russian astronomer and geodesist Ivan Zhongolovich.[2]

Orbit and classification[edit]

Zhongolovich is presumably the largest member of the Dora family (FIN: 512), a well-established central asteroid family of more than 1,200 carbonaceous asteroids, named after 668 Dora. The Dora family is alternatively known as the "Zhongolovich family".[4][5][14]:13,23

Zhongolovich orbits the Sun in the central main-belt at a distance of 2.1–3.4 AU once every 4 years and 8 months (1,690 days). Its orbit has an eccentricity of 0.23 and an inclination of 8° with respect to the ecliptic.[1] The body's observation arc begins 9 years after its official discovery observation at Simeiz, with its identification 1937 RO made at Johannesburg Observatory in September 1937.[13]

Physical characteristics[edit]

In the SMASS classification, Zhongolovich is characterized as a Ch-subtype, a carbonaceous C-type asteroid which shows evidence of hydrated minerals.[1]

Rotation period[edit]

In August 2011, a rotational lightcurve of Zhongolovich was obtained from photometric observations by French amateur astronomer Pierre Antonini. Lightcurve analysis gave a well-defined rotation period of 7.171 hours with a brightness variation of 0.21 magnitude (U=3).[11]

Diameter and albedo[edit]

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, Zhongolovich measures between 25.62 and 33.04 kilometers in diameter and its surface has an albedo between and 0.031 and 0.051.[6][7][8][9][10]

The Collaborative Asteroid Lightcurve Link agrees with the results obtained by IRAS, that is, an albedo of 0.0456 and a diameter of 28.47 kilometers with an absolute magnitude of 11.7.[3]


This minor planet is named in honor of Russian astronomer and geodesist Ivan Danilovich Zhongolovich, who was the head of the Special Ephemeris Department at the Institute of Theoretical Astronomy (ITA) in St Petersburg.[2] The official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 3933).[15]


  1. ^ a b c d e f "JPL Small-Body Database Browser: 1734 Zhongolovich (1928 TJ)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 7 June 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1734) Zhongolovich. Springer Berlin Heidelberg. p. 138. ISBN 978-3-540-00238-3. Retrieved 13 March 2017. 
  3. ^ a b c d e f "LCDB Data for (1734) Zhongolovich". Asteroid Lightcurve Database (LCDB). Retrieved 13 March 2017. 
  4. ^ a b Broz, M.; Morbidelli, A.; Bottke, W. F.; Rozehnal, J.; Vokrouhlický, D.; Nesvorný, D. (March 2013). "Constraining the cometary flux through the asteroid belt during the late heavy bombardment" (PDF). Astronomy and Astrophysics. 551: 16. arXiv:1301.6221Freely accessible. Bibcode:2013A&A...551A.117B. doi:10.1051/0004-6361/201219296. Retrieved 23 June 2017. 
  5. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 18 September 2017. 
  6. ^ a b c 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:1109.4096Freely accessible. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 13 March 2017. 
  7. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 13 March 2017. 
  8. ^ a b c 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 13 March 2017. 
  9. ^ a b c d 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:1606.08923Freely accessible. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 13 March 2017. 
  10. ^ 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 13 March 2017. 
  11. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1734) Zhongolovich". Geneva Observatory. Retrieved 13 March 2017. 
  12. ^ a b 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 13 March 2017. 
  13. ^ a b "1734 Zhongolovich (1928 TJ)". Minor Planet Center. Retrieved 13 March 2017. 
  14. ^ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families" (PDF). Asteroids IV: 297–321. arXiv:1502.01628Freely accessible. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. Retrieved 23 June 2017. 
  15. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 13 March 2017. 

External links[edit]