• Source: 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.
      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. It was named after Kemerovo Oblast in Siberia.


      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.
      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.


      Physical characteristics


      In the Tholen taxonomy, Kemerovo is an X-type asteroid. The dark body has also been characterized as a rare and reddish P-type asteroid by the NEOWISE mission.


      = 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).


      = 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. 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.


      Naming


      This minor planet was named after Kemerovo Oblast, the regional center of the Russian Kemerovo district, and a significant industrial center in Siberia. The official naming citation was published by the Minor Planet Center on 8 February 1982 (M.P.C. 6647).


      References




      External links


      Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
      Dictionary of Minor Planet Names, Google books
      Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
      Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
      2140 Kemerovo at AstDyS-2, Asteroids—Dynamic Site
      Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
      2140 Kemerovo at the JPL Small-Body Database

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