2140 Kemerovo

2140 Kemerovo, provisional designation 1970 PE, is a dark asteroid from the outer region of the asteroid belt, approximately 30 kilometers in diameter.

2140 Kemerovo
Discovery [1]
Discovered byL. Chernykh
T. Smirnova
Discovery siteCrimean Astrophysical Obs.
Discovery date3 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 arc64.85 yr (23,688 days)
Aphelion3.1617 AU
Perihelion2.8137 AU
2.9877 AU
Eccentricity0.0582
5.16 yr (1,886 days)
334.71°
0° 11m 27.24s / day
Inclination6.9851°
274.75°
119.69°
Physical characteristics
Dimensions29.33 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]

    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]

    Orbit and classification

    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]

    Physical characteristics

    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]

    Lightcurves

    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]

    Diameter and albedo

    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]

    Naming

    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]

    References
    1. "JPL Small-Body Database Browser: 2140 Kemerovo (1970 PE)" (2016-11-03 last obs.). Jet Propulsion Laboratory. Retrieved 11 June 2017.
    2. Schmadel, Lutz D. (2007). "(2140) Kemerovo". Dictionary of Minor Planet Names – (2140) Kemerovo. Springer Berlin Heidelberg. p. 173. doi:10.1007/978-3-540-29925-7_2141. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (2140) Kemerovo". Asteroid Lightcurve Database (LCDB). Retrieved 18 May 2016.
    4. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
    5. Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 17 October 2019. (online, AcuA catalog p. 153)
    6. Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 7 December 2016.
    7. Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 18 May 2016.
    8. Behrend, Raoul. "Asteroids and comets rotation curves – (2140) Kemerovo". Geneva Observatory. Retrieved 18 May 2016.
    9. "2140 Kemerovo (1970 PE)". Minor Planet Center. Retrieved 18 May 2016.
    10. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 18 May 2016.

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