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4936 Butakov, provisional designation 1985 UY₄, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. The asteroid was discovered on 22 October 1985, by Soviet–Ukrainian astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula. It was named after Russian admiral Grigory Butakov.

Orbit and classification

The S-type asteroid is a member of the Flora 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 5 months (1,254 days). Its orbit has an eccentricity of 0.13 and an inclination of 6° with respect to the ecliptic. The first precovery was obtained at the U.S. Goethe Link Observatory in 1950, extending the asteroid's observation arc by 35 years prior to its discovery.

Physical characteristics

Rotation period

According to the survey carried out by NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, Butakov measures 4.5 and 4.9 kilometers in diameter and its surface has a high albedo of 0.36 and 0.43, respectively, while the Collaborative Asteroid Lightcurve Link assumes an intermediate albedo of 0.24 – which derives from 8 Flora, the largest member and namesake of this orbital family – and calculates a somewhat larger diameter of 5.4 kilometers.

Diameter and albedo

In 2007, a rotational lightcurves of Butakov was obtained at the Carbuncle Hill Observatory which gave a rotation period of 13.828±0.001 hours with a brightness amplitude of 0.14 in magnitude (U=2). Two more lightcurves were obtained from photometric observations made at the U.S. Palomar Transient Factory in January and February 2014. They showed a rotation period of 19.200±0.380 and 13.9078±0.3029 hours, respectively, with a corresponding brightness variation of 0.11 and 0.08 in magnitude (U=2/2).

Naming

This minor planet was named in memory of Russian admiral Grigory Butakov (1820–1882), who fought in the Crimean War. In 1856, when the war ended, he became Rear admiral of the Black Sea Fleet and Naval Governor of Nikolaev and Sevastopol. The minor planet 2121 Sevastopol is named after the city on the Crimean peninsula. Butakov is widely credited as being the father of steam-powered ship tactics during the 19th century. 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: 4936 Butakov (1985 UY4)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 20 June 2017.
2. ^ Schmadel, Lutz D. (2007). "(4936) Butakov". Dictionary of Minor Planet Names – (4936) Butakov. Springer Berlin Heidelberg. p. 425. doi:10.1007/978-3-540-29925-7_4823. ISBN 978-3-540-00238-3.
3. ^ "LCDB Data for (4936) Butakov". Asteroid Lightcurve Database (LCDB). Retrieved 2 May 2016.
4. ^ Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 5 December 2016.
5. ^ Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 2 May 2016.
6. ^ Pray, Donald P.; Galad, Adrian; Husarik, Marek; Oey, Julian (March 2008). "Lightcurve Analysis of Fourteen Asteroids". The Minor Planet Bulletin. 35 (1): 34–36. Bibcode:2008MPBu...35...34P. ISSN 1052-8091. Retrieved 2 May 2016.
7. ^ Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 2 May 2016.
8. ^ Chang, Chan-Kao; Ip, Wing-Huen; Lin, Hsing-Wen; Cheng, Yu-Chi; Ngeow, Chow-Choong; Yang, Ting-Chang; et al. (August 2015). "Asteroid Spin-rate Study Using the Intermediate Palomar Transient Factory". The Astrophysical Journal Supplement Series. 219 (2): 19. arXiv:1506.08493. Bibcode:2015ApJS..219...27C. doi:10.1088/0067-0049/219/2/27. Retrieved 2 May 2016.
9. ^ "4936 Butakov (1985 UY4)". Minor Planet Center. Retrieved 2 May 2016.
10. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 2 May 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
• 4936 Butakov at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 4936 Butakov at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

• Minor planet object articles (numbered)
• Flora asteroids
• Baptistina asteroids
• Discoveries by Lyudmila Zhuravleva
• Named minor planets
• Astronomical objects discovered in 1985