1734 Zhongolovich
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet = yes
| name = 1734 Zhongolovich
| background = #D6D6D6
| image =
| image_size =
| caption =
| discovered = 11 October 1928
| discoverer = G. Neujmin
| discovery_site = Simeiz Obs.
| mpc_name = (1734) Zhongolovich
| alt_names = 1928 TJ{{·}}1937 RO
1942 XQ{{·}}{{mp|1951 RM|1}}
1965 UG
| pronounced =
| named_after = Ivan Danilovich Zhongolovich
{{small|(Russian geodesist, ITA)}}
| mp_category = main-belt{{·}}{{small|(middle)}}
Dora familyDora
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 88.43 yr (32,298 days)
| aphelion = 3.4186 AU
| perihelion = 2.1341 AU
| semimajor = 2.7763 AU
| eccentricity = 0.2313
| period = 4.63 yr (1,690 days)
| mean_anomaly = 83.389°
| mean_motion = {{Deg2DMS|0.2131|sup=ms}} / day
| inclination = 8.3467°
| asc_node = 182.16°
| arg_peri = 186.45°
| dimensions = {{val|25.620|0.113}} km
{{val|26.425|0.122}}
28.47 {{small|(IRAS:16)}} km
{{val|28.67|10.07}} km
{{val|33.04|0.71}} km
| rotation = {{val|7.171|0.004}} h
| albedo = {{val|0.031|0.001}}
{{val|0.035|0.002}}
{{val|0.04|0.05}}
0.0456 {{small|(IRAS:16)}}
{{val|0.0508|0.0008}}
| spectral_type = SMASS = Ch{{·}}C
| abs_magnitude = {{val|11.68|0.38}}{{·}}11.7{{·}}11.74
}}
1734 Zhongolovich, provisional designation {{mp|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. It was later named after Russian astronomer and geodesist Ivan Zhongolovich.
Orbit and classification
Zhongolovich is presumably the largest member of the Dora family ({{small|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".{{rp|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. The body's observation arc begins 9 years after its official discovery observation at Simeiz, with its identification {{mp|1937 RO}} made at Johannesburg Observatory in September 1937.
Physical characteristics
In the SMASS classification, Zhongolovich is characterized as a Ch-subtype, a carbonaceous C-type asteroid which shows evidence of hydrated minerals.
= 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 ({{small|U=3}}).
= 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.
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.
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. The official {{MoMP|1734|naming citation}} was published by the Minor Planet Center on 20 February 1976 ({{small|M.P.C. 3933}}).
References
{{reflist|30em|refs=
|type = 2017-03-29 last obs.
|title = JPL Small-Body Database Browser: 1734 Zhongolovich (1928 TJ)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001734
|publisher = Jet Propulsion Laboratory
|access-date = 7 June 2017}}
|last = Schmadel | first = Lutz D.
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|isbn = 978-3-540-00238-3
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|title = 1734 Zhongolovich (1928 TJ)
|work = Minor Planet Center
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|title = Asteroids and comets rotation curves – (1734) Zhongolovich
|last = Behrend |first = Raoul
|publisher = Geneva Observatory
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|access-date = 13 March 2017}}
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|title = Asteroid 1734 Zhongolovich – Nesvorny HCM Asteroid Families V3.0
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|title = LCDB Data for (1734) Zhongolovich
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1734%7CZhongolovich
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|display-authors = 6
|first1 = Fumihiko |last1 = Usui
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|display-authors = 6
|first1 = A. |last1 = Mainzer
|first2 = T. |last2 = Grav
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|display-authors = 6
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|display-authors = 6
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|first2 = Robert |last2 = Jedicke
|first3 = Alan |last3 = Fitzsimmons
|first4 = Larry |last4 = Denneau
|first5 = Mikael |last5 = Granvik
|first6 = Bryce |last6 = Bolin
|first7 = Serge |last7 = Chastel
|first8 = Richard J. |last8 = Wainscoat
|first9 = William S. |last9 = Burgett
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|first13 = Eugen A. |last13 = Magnier
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|bibcode = 2015Icar..261...34V
|doi = 10.1016/j.icarus.2015.08.007
|arxiv = 1506.00762
|access-date= 13 March 2017}}
}}
External links
- [http://adsabs.harvard.edu/abs/2004PDSS....1..252B 1734 Zhongolovich CCD Spectrum] – PDS: Schelte J. Bus, Richard P. Binzel, October 2004
- [http://www.minorplanet.info/PHP/lcdbsummaryquery.php Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info] {{Webarchive|url=https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html |date=16 December 2017 }})
- [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
- [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Observatoire de Genève, Raoul Behrend
- [https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
- {{AstDys|1734}}
- {{JPL small body}}
{{Minor planets navigator |1733 Silke |number=1734 |1735 ITA}}
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