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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. The asteroid was named for Russian field marshal Michael Andreas Barclay de Tolly.

Orbit and classification

Barklajdetolli is an attributed member of the Vestian family, one of the largest groups of stony asteroids in the main-belt. 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.

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.

Physical characteristics

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

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).

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.

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.

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.

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. The official naming citation was published by the Minor Planet Center on 4 May 1999 (M.P.C. 34620).

References

1. ^ "JPL Small-Body Database Browser: 4524 Barklajdetolli (1981 RV4)" (2016-11-23 last obs.). Jet Propulsion Laboratory. Retrieved 20 June 2017.
2. ^ Schmadel, Lutz D. (2007). "(4524) Barklajdetolli". Dictionary of Minor Planet Names – (4524) Barklajdetolli. Springer Berlin Heidelberg. p. 389. doi:10.1007/978-3-540-29925-7_4463. ISBN 978-3-540-00238-3.
3. ^ "Asteroid 4524 Barklajdetolli". Small Bodies Data Ferret. Retrieved 23 July 2018.
4. ^ "Asteroid (4524) Barklajdetolli – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Archived from the original on 2 July 2020. Retrieved 23 July 2018.
5. ^ "LCDB Data for (4524) Barklajdetolli". Asteroid Lightcurve Database (LCDB). Retrieved 30 June 2016.
6. ^ Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 30 June 2016.
7. ^ Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
8. ^ Pray, Donald P.; Durkee, Russell I. (January 2010). "The Extremely Long Period of 4524 Barklajdetolli". The Minor Planet Bulletin. 37 (1): 35. Bibcode:2010MPBu...37...35P. ISSN 1052-8091. Retrieved 30 June 2016.
9. Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 30 June 2016.
10. ^ "4524 Barklajdetolli (1981 RV4)". Minor Planet Center. Retrieved 30 June 2016.
11. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 30 June 2016.

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 viewer · Orbit parameters · Physical parameters

• Minor planet object articles (numbered)
• Vesta asteroids
• Discoveries by Lyudmila Zhuravleva
• Named minor planets
• Slow rotating minor planets
• Astronomical objects discovered in 1981