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]