| Discovery[1] | |
|---|---|
| Discovered by | N. Chernykh |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 3 October 1978 |
| Designations | |
| (9916) Kibirev | |
Named after | Sergej Kibirev[1] (Russian informatician) |
| 1978 TR2 · 1983 VL1 | |
| main-belt[1][2] · (outer) Koronis[3][4] | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 44.52yr (16,261 d) |
| Aphelion | 3.0950AU |
| Perihelion | 2.6050 AU |
| 2.8500 AU | |
| Eccentricity | 0.0860 |
| 4.81 yr (1,757 d) | |
| 83.251° | |
| 0° 12m 17.28s / day | |
| Inclination | 1.0178° |
| 288.18° | |
| 79.224° | |
| Physical characteristics | |
| 5.49 km(calculated)[4] 6.201±0.050 km[5][6] | |
| 15.171±0.3802 h[7] 15.48±0.250 h[8] | |
| 0.24(assumed)[4] 0.260±0.034[5] 0.2898±0.0435[6] | |
| S(assumed)[4] | |
| 13.0[6] 13.018±0.002(R)[7] 13.160±0.170(R)[8] 13.2[2] 13.37±0.30[9] 13.47[4] | |
9916 Kibirev, provisional designation1978 TR2, is a Koronianasteroid from the outer regions of theasteroid belt, approximately 6 kilometers (3.7 miles) in diameter. It was discovered on 3 October 1978, by astronomerNikolai Chernykh at theCrimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. The likelyS-type asteroid has arotation period of about 15.2 hours and was named after Russian informaticianSergej Kibirev.[1][4]
Kibirev is a core member of theKoronis family (605),[4][3] a very large outerasteroid family with nearly co-planar ecliptical orbits.[10] It orbits the Sun in theouter 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 aneccentricity of 0.09 and aninclination of 1° with respect to theecliptic.[2] The body'sobservation arc begins with aprecovery taken atPalomar Observatory in September 1973, or 5 years prior to its official discovery observation.[1]
Kibirev is an assumedS-type asteroid,[4] which is also the Koronis family's overallspectral type.[10]: 23
In 2014, two rotationallightcurves ofKibirev were obtained fromphotometric observations in the R-band by astronomers at thePalomar Transient Factory in California.[7][8] Lightcurve analysis gave arotation period of 15.171 and 15.48 hours with a brightness amplitude of 0.36 and 0.45magnitude, respectively (U=2/2).[4]
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Kibirev measures 6.201 kilometers in diameter and its surface has analbedo between 0.260 and 0.2898.[5][6]
TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.24 and calculates a diameter of 5.49 kilometers based on anabsolute magnitude of 13.47.[4]
Thisminor planet was named after RussianSergej Feodosievich Kibirev (born 1950), who works on new methods to process information and organizes the production of microelectronics in the Russian city ofNovosibirsk.[1] The official naming citation was published by theMinor Planet Center on 9 March 2001 (M.P.C. 42359).[11]
