astro.wikisort.org - Asteroid

4524 Barklajdetolli, provisional designation 1981 RV₄, is an elongated Vestian asteroid and an exceptionally slow rotator from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 8 September 1981, by Russian–Ukrainian astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.[10] The asteroid was named for Russian field marshal Michael Andreas Barclay de Tolly.[2]

4524 Barklajdetolli

Discovery [1]
Discovered by	L. V. Zhuravleva
Discovery site	Crimean Astrophysical Obs.
Discovery date	8 September 1981
Designations
MPC designation	(4524) Barklajdetolli
Named after	Michael Andreas Barclay de Tolly (Russian Field Marshal)[2]
Alternative designations	1981 RV4 · 1935 SC1 1935 SN · 1973 FH 1988 RR6
Minor planet category	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	2.6292 AU
Perihelion	2.0123 AU
Semi-major axis	2.3208 AU
Eccentricity	0.1329
Orbital period (sidereal)	3.54 yr (1,291 days)
Mean anomaly	87.691°
Mean motion	0° 16m 43.68s / day
Inclination	7.2862°
Longitude of ascending node	177.20°
Argument of perihelion	149.44°
Physical characteristics
Dimensions	7.14 km (calculated)[5] 12.12±0.18 km[6] 13.59±0.26 km[7]
Synodic rotation period	1069 h[8]
Geometric albedo	0.052±0.002[7] 0.100±0.010[6] 0.24 (assumed)[5]
Spectral type	S [5]
Absolute magnitude (H)	12.70[6] · 12.89±0.38[9] · 12.9[1][5] · 13.20[7]

Orbit and classification

Barklajdetolli is an attributed member of the Vestian family, one of the largest groups of stony asteroids in the main-belt.[3][4] It orbits the Sun in the inner main-belt at a distance of 2.0–2.6 AU once every 3 years and 6 months (1,291 days). Its orbit has an eccentricity of 0.13 and an inclination of 7° with respect to the ecliptic.[1]

In September 1935, it was first identified as 1935 SN and 1935 SC₁ at Simeiz and Johannesburg Observatory, respectively. The body's observation arc begins with a precovery taken at Palomar Observatory in 1953, or 28 years prior to its official discovery observation at Nauchnyj.[10]

Physical characteristics

Barklajdetolli has been characterized as a common stony S-type asteroid.[5]

Slow rotator and shape

In August 2009, a rotational lightcurve for this asteroid was obtained at the Carbuncle Hill Observatory (912) on Rhode Island, United States. Lightcurve analysis gave an exceptionally long rotation period of 1,069 hours with a high brightness amplitude of 1.26 in magnitude (U=2).[8]

While the period still may be wrong by a few hundred hours, it is one of the slowest rotating asteroids known to exist. The exceptionally high variation in brightness indicates that the body has a non-spheroidal shape.[8]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid's surface has a low albedo of 0.05 and 0.10, respectively, while the Collaborative 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 certain absolute magnitude.[5][6][7]

Naming

This minor 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 the French invasion of Russia in the Patriotic War of 1812.[2] The official naming citation was published by the Minor Planet Center on 4 May 1999 (M.P.C. 34620).[11]

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
• 4524 Barklajdetolli at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 4524 Barklajdetolli at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (4524) Barklajdetolli

(4524) Barklajdetolli ist ein Asteroid des Hauptgürtels, der am 8. September 1981 von der ukrainisch-sowjetischen Astronomin Ljudmyla Schurawlowa am Krim-Observatorium (IAU-Code 095) in Nautschnyj entdeckt wurde. Erste Sichtungen des Asteroiden hatte es bereits im September 1935 am Observatorium in Simejis (IAU-Code 094) und am Union-Observatorium (IAU-Code 078) in Johannesburg gegeben.[1]

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- [en] 4524 Barklajdetolli

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[ru] (4524) Барклайдетолли

(4524) Барклайдетолли (англ. 4524 Barklajdetolli), ранее 1981 RV4 — вытянутый астероид семейства Весты, очень медленно вращающийся, во внутренней части пояса астероидов, примерно 10 километров в диаметре. Открыт 8 сентября 1981 года астрономом Людмилой Журавлёвой в Крымской обсерватории в Научном, Крым.[9] Назван в честь российского полководца Михаила Богдановича Барклая-де-Толли.[10]

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