| Discovery[1] | |
|---|---|
| Discovered by | L. V. Zhuravleva |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 8 September 1981 |
| Designations | |
| (4524) Barklajdetolli | |
Named after | Michael Andreas Barclay de Tolly (Russian Field Marshal)[2] |
| 1981 RV4 · 1935 SC1 1935 SN · 1973 FH 1988 RR6 | |
| main-belt · Vest[3][4][5] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 63.12 yr (23,055 days) |
| Aphelion | 2.6292AU |
| Perihelion | 2.0123 AU |
| 2.3208 AU | |
| Eccentricity | 0.1329 |
| 3.54yr (1,291 days) | |
| 87.691° | |
| 0° 16m 43.68s / day | |
| Inclination | 7.2862° |
| 177.20° | |
| 149.44° | |
| Physical characteristics | |
| Dimensions | 7.14 km(calculated)[5] 12.12±0.18 km[6] 13.59±0.26 km[7] |
| 1069h[8] | |
| 0.052±0.002[7] 0.100±0.010[6] 0.24(assumed)[5] | |
| S[5] | |
| 12.70[6] · 12.89±0.38[9] · 12.9[1][5] · 13.20[7] | |
4524 Barklajdetolli, provisional designation1981 RV4, is an elongated Vestianasteroid and an exceptionallyslow rotator from the inner regions of theasteroid belt, approximately 10 kilometers in diameter. It was discovered on 8 September 1981, by Russian–Ukrainian astronomerLyudmila Zhuravleva at theCrimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.[10] The asteroid was named for Russian field marshalMichael Andreas Barclay de Tolly.[2]
Barklajdetolli is an attributed member of theVestian family, one of the largest groups of stony asteroids in the main-belt.[3][4] It orbits the Sun in theinner main-belt at a distance of 2.0–2.6 AU once every 3 years and 6 months (1,291 days). Its orbit has aneccentricity of 0.13 and aninclination of 7° with respect to theecliptic.[1]
In September 1935, it was first identified as1935 SN and1935 SC1 atSimeiz andJohannesburg Observatory, respectively. The body'sobservation arc begins with aprecovery taken atPalomar Observatory in 1953, or 28 years prior to its official discovery observation at Nauchnyj.[10]
Barklajdetolli has been characterized as a common stonyS-type asteroid.[5]
In August 2009, a rotationallightcurve for this asteroid was obtained at the Carbuncle Hill Observatory (912) on Rhode Island, United States. Lightcurve analysis gave an exceptionally longrotation period of 1,069 hours with a high brightness amplitude of 1.26 inmagnitude (U=2).[8]
While the period still may be wrong by a few hundred hours, it is one of theslowest rotating asteroids known to exist. The exceptionally high variation in brightness indicates that the body has a non-spheroidal shape.[8]
According to the surveys carried out by the JapaneseAkari satellite and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission, the asteroid's surface has a lowalbedo of 0.05 and 0.10, respectively, while theCollaborative Asteroid Lightcurve Link (CALL) assumes a much higher albedo of 0.24, derived from its Flora family classification. The divergent albedos also translate into different estimates for the body's size.[5][6][7]
While the space-based surveys find a diameter of 12.1 and 13.6 kilometers, respectively, CALL calculates only 7.1 kilometers, as the higher a body's albedo (reflectivity), the smaller its diameter for a certainabsolute magnitude.[5][6][7]
Thisminor planet was named in memory of Russian field marshal of Scottish descent,Michael Andreas Barclay de Tolly (1761–1818). He was Russia's Minister of War and commander-in-chief of its armies during theFrench invasion of Russia in the Patriotic War of 1812.[2] The official naming citation was published by theMinor Planet Center on 4 May 1999 (M.P.C. 34620).[11]
