| Discovery[1] | |
|---|---|
| Discovered by | L. V. Zhuravleva |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 22 October 1985 |
| Designations | |
| (4936) Butakov | |
Named after | Grigory Butakov (Russian admiral)[2] |
| 1985 UY4 · 1978 TK4 1978 VH12 | |
| main-belt · Flora[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 66.70 yr (24,364 days) |
| Aphelion | 2.5617AU |
| Perihelion | 1.9909 AU |
| 2.2763 AU | |
| Eccentricity | 0.1254 |
| 3.43yr (1,254 days) | |
| 70.538° | |
| 0° 17m 13.2s / day | |
| Inclination | 5.9129° |
| 155.77° | |
| 283.92° | |
| Physical characteristics | |
| Dimensions | 4.465±0.051[4] 4.867±0.025 km[5] 5.41 km(calculated)[3] |
| 13.828±0.001h[6] 13.9078±0.3029 h[7] 19.200±0.380 h[8] | |
| 0.24(assumed)[3] 0.3589±0.0587[5] 0.428±0.076[4] | |
| S[3] | |
| 13.5[1][3] · 13.3[5] · 13.400±0.080(R)[8] · 13.418±0.001(R)[7] | |
4936 Butakov, provisional designation1985 UY4, is a stony Florianasteroid from the inner regions of theasteroid belt, approximately 5 kilometers in diameter. The asteroid was discovered on 22 October 1985, by Soviet–Ukrainian astronomerLyudmila Zhuravleva at theCrimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.[9] It was named after Russian admiralGrigory Butakov.[2]
TheS-type asteroid is a member of theFlora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun in theinner main-belt at a distance of 2.0–2.6 AU once every 3 years and 5 months (1,254 days). Its orbit has aneccentricity of 0.13 and aninclination of 6° with respect to theecliptic.[1] The firstprecovery was obtained at the U.S.Goethe Link Observatory in 1950, extending the asteroid'sobservation arc by 35 years prior to its discovery.[9]
According to the survey carried out byNEOWISE mission of NASA's space-basedWide-field Infrared Survey Explorer,Butakov measures 4.5 and 4.9 kilometers in diameter and its surface has a highalbedo of 0.36 and 0.43, respectively,[4][5] while theCollaborative Asteroid Lightcurve Link assumes an intermediate albedo of 0.24 – which derives from8 Flora, the largest member and namesake of this orbital family – and calculates a somewhat larger diameter of 5.4 kilometers.[3]
In 2007, a rotationallightcurves ofButakov was obtained at the Carbuncle Hill Observatory which gave arotation period of13.828±0.001 hours with a brightness amplitude of 0.14 inmagnitude (U=2).[6] Two more lightcurves were obtained from photometric observations made at the U.S.Palomar Transient Factory in January and February 2014. They showed arotation period of19.200±0.380 and13.9078±0.3029 hours, respectively, with a corresponding brightness variation of 0.11 and 0.08 in magnitude (U=2/2).[8][7]
Thisminor planet was named in memory of Russian admiralGrigory Butakov (1820–1882), who fought in theCrimean War. In 1856, when the war ended, he becameRear admiral of theBlack Sea Fleet and Naval Governor of Nikolaev and Sevastopol. The minor planet2121 Sevastopol is named after the city on the Crimean peninsula.[2] Butakov is widely credited as being the father of steam-powered ship tactics during the 19th century. The official naming citation was published by theMinor Planet Center on 4 May 1999 (M.P.C. 34620).[10]
