| 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 | 3.1617 AU |
| Perihelion | 2.8137 AU |
| 2.9877 AU | |
| Eccentricity | 0.0582 |
| 5.16 yr (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 designation 1970 PE, is a dark asteroid from the outer region of the asteroid belt, approximately 30 kilometers in diameter.
The asteroid was discovered on 3 August 1970, by Russian female astronomers Lyudmila Chernykh and Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.[9] It was named after Kemerovo Oblast in Siberia.[2]
Kemerovo orbits the Sun in the outer main-belt at a distance of 2.8–3.2 AU once every 5 years and 2 months (1,886 days). Its orbit has an eccentricity of 0.06 and an inclination of 7° with respect to the ecliptic.[1]
It was first identified as 1926 AJ at Bergedorf Observatory in 1926. The body's observation arc begins with its first used observation, a precovery taken at Palomar Observatory in 1951, approximately 19 years prior to its official discovery at Nauchnyj.[9]
In the Tholen taxonomy, Kemerovo is an X-type asteroid.[1] The dark body has also been characterized as a rare and reddish P-type asteroid by the NEOWISE mission.[7]
Two rotational lightcurves of Kemerovo were obtained from photometric observations made by French astronomers René Roy, Laurent Bernasconi and Olivier Thizy in August 2001 and July 2006. Both lightcurves gave a rotation period of 9.2±0.6 hours with a brightness amplitude of 0.18 and 0.19 in magnitude, respectively (U=2/2).[8]
According to the space-based surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite (mid-infrared), and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Kemerovo measures between 29.5 and 37.9 kilometers in diameter, and its surface has an albedo between 0.05 and 0.09.[4][5][7] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.062 and calculates a diameter of 29.3 kilometers with an absolute magnitude of 11.3.[3]
This minor planet was named after Kemerovo Oblast, the regional center of the Russian Kemerovo district, and a significant industrial center in Siberia.[2] The official naming citation was published by the Minor Planet Center on 8 February 1982 (M.P.C. 6647).[10]
