2055_Dvořák

2055 Dvořák

2055 Dvořák

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2055 Dvořák (/dəˈvɔːr.ʒɑːk/ or /ˈdvɔːr-, -ʒæk/ d-VOR-zha(h)k), provisional designation 1974 DB, is an eccentric asteroid and sizable Mars-crosser from the innermost regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 19 February 1974, by Czech astronomer Luboš Kohoutek at the Bergedorf Observatory in Hamburg, Germany.[3] It was named after Czech composer Antonín Dvořák.[2]

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Classification and orbit

Dvořák is a Mars-crossing asteroid, as it crosses the orbit of Mars at 1.666 AU. It orbits the Sun at a distance of 1.6–3.0 AU once every 3 years and 6 months (1,283 days). Its orbit has an eccentricity of 0.31 and an inclination of 21° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation at Bergedorf in 1974.[3]

Physical characteristics

Lightcurves

In July 2013, two rotational lightcurves of Dvořák were obtained from photometric observations by Julian Oey at the Blue Mountain Observatory (Q68), Australia, and by a collaboration of astronomers in Argentina. Lightcurve analysis gave a concurring rotation period of 4.405 and 4.4106 hours, respectively, both with a brightness variation of 0.17 magnitude (U=3-/3-).[5][6]

Diameter and albedo estimates

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 8.18 kilometers based on an absolute magnitude of 12.8.[4] Dvořák has not been surveyed by any of the space-based telescopes such as IRAS, Akari and WISE.[1][4]

Naming

This minor planet was named after Czech composer Antonin Dvořák (1841–1904), one of the worldwide known Czech composers along with Bedřich Smetana.[2] The official naming citation was published by the Minor Planet Center on 1 July 1979 (M.P.C. 4786).[8]

References

  1. [1]
    "JPL Small-Body Database Browser: 2055 Dvorak (1974 DB)" (2016-07-03 last obs.). Jet Propulsion Laboratory. Retrieved 29 June 2017.
  2. [2]
    Schmadel, Lutz D. (2007). "(2055) Dvořák". Dictionary of Minor Planet Names – (2055) Dvořák. Springer Berlin Heidelberg. p. 166. doi:10.1007/978-3-540-29925-7_2056. ISBN 978-3-540-00238-3.
  3. [3]
    "2055 Dvorak (1974 DB)". Minor Planet Center. Retrieved 29 June 2017.
  4. [4]
    "LCDB Data for (2055) Dvořák". Asteroid Lightcurve Database (LCDB). Retrieved 29 June 2017.
  5. [5]
    Mazzone, Fernando; Colazo, Carlos; Mina, Federico; Melia, Raul; Spagnotto, Julio; Bernal, Alejandro (January 2014). "Collaborative Asteroid Photometry and Lightcurve Analysis at Observatories OAEGG, OAC, EABA, and OAS". The Minor Planet Bulletin. 41 (1): 17–19. Bibcode:2014MPBu...41...17M. ISSN 1052-8091. Retrieved 29 June 2017.
  6. [6]
    Oey, Julian (October 2014). "Lightcurve Analysis of Asteroids from Blue Mountains Observatory in 2013". The Minor Planet Bulletin. 41 (4): 276–281. Bibcode:2014MPBu...41..276O. ISSN 1052-8091. Retrieved 29 June 2017.
  7. [7]
    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 29 June 2017.
  8. [8]
    Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.
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