1734 Zhongolovich

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

1734 Zhongolovich

Discovery[1]
Discovered by	G. Neujmin
Discovery site	Simeiz Obs.
Discovery date	11 October 1928
Designations
MPC designation	(1734) Zhongolovich
Named after	Ivan Danilovich Zhongolovich (Russian geodesist, ITA)[2]
Alternative designations	1928 TJ · 1937 RO 1942 XQ · 1951 RM1 1965 UG
Minor planet category	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
Semi-major axis	2.7763 AU
Eccentricity	0.2313
Orbital period (sidereal)	4.63 yr (1,690 days)
Mean anomaly	83.389°
Mean motion	0° 12m 47.16s / day
Inclination	8.3467°
Longitude of ascending node	182.16°
Argument of perihelion	186.45°
Physical characteristics
Dimensions	25.620±0.113 km[6] 26.425±0.122[7] 28.47 (IRAS:16) km[3][8] 28.67±10.07 km[9] 33.04±0.71 km[10]
Synodic rotation period	7.171±0.004 h[11]
Geometric albedo	0.031±0.001[6] 0.035±0.002[10] 0.04±0.05[9] 0.0456 (IRAS:16)[3][8] 0.0508±0.0008[7]
Spectral type	SMASS = Ch[1] · C[3][12]
Absolute magnitude (H)	11.68±0.38[12] · 11.7[1][3][7][10] · 11.74[9]

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

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

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

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

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]

Naming

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 on 20 February 1976 (M.P.C. 3933).^[15]

References

1. "JPL Small-Body Database Browser: 1734 Zhongolovich (1928 TJ)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 7 June 2017.
2. Schmadel, Lutz D. (2007). "(1734) Zhongolovich". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 138. doi:10.1007/978-3-540-29925-7_1735. ISBN 978-3-540-00238-3.
3. "LCDB Data for (1734) Zhongolovich". Asteroid Lightcurve Database (LCDB). Retrieved 13 March 2017.
4. 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". Astronomy and Astrophysics. 551: 16. arXiv:1301.6221. Bibcode:2013A&A...551A.117B. doi:10.1051/0004-6361/201219296.
5. "Asteroid 1734 Zhongolovich – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 26 October 2019.
6. 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 13 March 2017.
7. 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.
8. 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 17 October 2019.
9. 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.
10. 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. (online, AcuA catalog p. 153)
11. Behrend, Raoul. "Asteroids and comets rotation curves – (1734) Zhongolovich". Geneva Observatory. Retrieved 13 March 2017.
12. 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 13 March 2017.
13. "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". Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 978-0-8165-3213-1.
15. Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.

External links

• 1734 Zhongolovich CCD Spectrum – PDS: Schelte J. Bus, Richard P. Binzel, October 2004
• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 1734 Zhongolovich at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1734 Zhongolovich at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters