| Discovery[1] | |
|---|---|
| Discovered by | G. Neujmin |
| Discovery site | Simeiz Obs. |
| Discovery date | 11 October 1928 |
| Designations | |
| (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 | 3.4186AU |
| Perihelion | 2.1341 AU |
| 2.7763 AU | |
| Eccentricity | 0.2313 |
| 4.63yr (1,690 days) | |
| 83.389° | |
| 0° 12m 47.16s / day | |
| Inclination | 8.3467° |
| 182.16° | |
| 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] |
| 7.171±0.004h[11] | |
| 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] | |
| SMASS = Ch[1] · C[3][12] | |
| 11.68±0.38[12] · 11.7[1][3][7][10] · 11.74[9] | |
1734 Zhongolovich, provisional designation1928 TJ, is a carbonaceous Dorianasteroid from the central region of theasteroid belt, approximately 28 kilometers in diameter.
It was discovered on 11 October 1928, by Russian astronomerGrigory Neujmin atSimeiz Observatory on the Crimean peninsula.[13] It was later named after Russian astronomer and geodesistIvan Zhongolovich.[2]
Zhongolovich is presumably the largest member of theDora family (FIN: 512), a well-established centralasteroid family of more than 1,200 carbonaceous asteroids, named after668 Dora. The Dora family is alternatively known as the "Zhongolovich family".[4][5][14]: 13, 23
Zhongolovich orbits the Sun in thecentral main-belt at a distance of 2.1–3.4 AU once every 4 years and 8 months (1,690 days). Its orbit has aneccentricity of 0.23 and aninclination of 8° with respect to theecliptic.[1] The body'sobservation arc begins 9 years after its official discovery observation at Simeiz, with its identification1937 RO made atJohannesburg Observatory in September 1937.[13]
In theSMASS classification,Zhongolovich is characterized as a Ch-subtype, a carbonaceousC-type asteroid which shows evidence of hydrated minerals.[1]
In August 2011, a rotationallightcurve ofZhongolovich was obtained from photometric observations by French amateur astronomerPierre Antonini. Lightcurve analysis gave a well-definedrotation period of 7.171 hours with a brightness variation of 0.21magnitude (U=3).[11]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite, and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Zhongolovich measures between 25.62 and 33.04 kilometers in diameter and its surface has analbedo between and 0.031 and 0.051.[6][7][8][9][10]
TheCollaborative 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 anabsolute magnitude of 11.7.[3]
Thisminor 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 officialnaming citation was published by theMinor Planet Center on 20 February 1976 (M.P.C. 3933).[15]
