| Discovery[1] | |
|---|---|
| Discovered by | L. Chernykh T. Smirnova |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 3 August 1970 |
| Designations | |
| (2140) Kemerovo | |
Named after | Kemerovo Oblast (Russian federal subject)[2] |
| 1970 PE · 1926 AJ 1940 WB · 1952 BH1 1957 BB · 1973 FY 1974 MP · 1975 NM1 1975 QJ · 1975 RM1 | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 64.85 yr (23,688 days) |
| Aphelion | 3.1617AU |
| Perihelion | 2.8137 AU |
| 2.9877 AU | |
| Eccentricity | 0.0582 |
| 5.16yr (1,886 days) | |
| 334.71° | |
| 0° 11m 27.24s / day | |
| Inclination | 6.9851° |
| 274.75° | |
| 119.69° | |
| Physical characteristics | |
| Dimensions | 29.33 km(derived)[3] 29.49±1.6 km(IRAS:4)[4] 32.11±0.52 km[5] 34.539±0.128[6] 37.886±0.366 km[7] |
| 9.2±0.6 h(2006)[8] | |
| 0.0537±0.0073[7] 0.0620(derived)[3] 0.063±0.007[6] 0.076±0.003[5] 0.0887±0.011(IRAS:4)[4] | |
| P[7] · X(Tholen)[3] | |
| 10.9[4][5][7] · 11.3[1][3] | |
2140 Kemerovo, provisional designation1970 PE, is a darkasteroid from the outer region of theasteroid belt, approximately 30 kilometers in diameter.
The asteroid was discovered on 3 August 1970, by Russian female astronomersLyudmila Chernykh andTamara Smirnova at theCrimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.[9] It was named afterKemerovo Oblast in Siberia.[2]
Kemerovo orbits the Sun in theouter main-belt at a distance of 2.8–3.2 AU once every 5 years and 2 months (1,886 days). Its orbit has aneccentricity of 0.06 and aninclination of 7° with respect to theecliptic.[1]
It was first identified as1926 AJ atBergedorf Observatory in 1926. The body'sobservation arc begins with its first used observation, aprecovery taken atPalomar Observatory in 1951, approximately 19 years prior to its official discovery at Nauchnyj.[9]
In theTholen taxonomy,Kemerovo is anX-type asteroid.[1] The dark body has also been characterized as a rare and reddishP-type asteroid by theNEOWISE mission.[7]
Two rotationallightcurves ofKemerovo were obtained from photometric observations made by French astronomersRené Roy,Laurent Bernasconi and Olivier Thizy in August 2001 and July 2006. Both lightcurves gave arotation period of9.2±0.6 hours with a brightness amplitude of 0.18 and 0.19 inmagnitude, respectively (U=2/2).[8]
According to the space-based surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite (mid-infrared), and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Kemerovo measures between 29.5 and 37.9 kilometers in diameter, and its surface has analbedo between 0.05 and 0.09.[4][5][7] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.062 and calculates a diameter of 29.3 kilometers with anabsolute magnitude of 11.3.[3]
Thisminor planet was named afterKemerovo Oblast, the regional center of the Russian Kemerovo district, and a significant industrial center in Siberia.[2] The official naming citation was published by theMinor Planet Center on 8 February 1982 (M.P.C. 6647).[10]
