9916 Kibirev
asteroid
9916 Kibirev, provisional designation 1978 TR2, is a Koronian asteroid from the outer regions of the asteroid belt, approximately 6 kilometers (3.7 miles) in diameter. It was discovered on 3 October 1978, by astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. The likely S-type asteroid has a rotation period of about 15.2 hours and was named after Russian informatician Sergej Kibirev.
Orbit and classification
Kibirev is a core member of the Koronis family (605), a very large outer asteroid family with nearly co-planar ecliptical orbits. It orbits the Sun in the outer main-belt at a distance of 2.6–3.1 AU once every 4 years and 10 months (1,757 days; semi-major axis of 2.85 AU). Its orbit has an eccentricity of 0.09 and an inclination of 1° with respect to the ecliptic. The body's observation arc begins with a precovery taken at Palomar Observatory in September 1973, or 5 years prior to its official discovery observation.
Physical characteristics
Kibirev is an assumed S-type asteroid, which is also the Koronis family's overall spectral type.
Rotation period
In 2014, two rotational lightcurves of Kibirev were obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 15.171 and 15.48 hours with a brightness amplitude of 0.36 and 0.45 magnitude, respectively (U=2/2).
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This entry incorporates text from “9916 Kibirev” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.