2055 Dvořák

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]

2055 Dvořák
Discovery [1]
Discovered byL. Kohoutek
Discovery siteBergedorf Obs.
Discovery date19 February 1974
Designations
(2055) Dvořák
Pronunciation/dəˈvɔːrʒɑːk, ˈdvɔːr-, -ʒæk/
d-VOR-zha(h)k
Named after
Antonín Dvořák
(Czech composer)[2]
1974 DB
Mars-crosser [1][3][4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc42.37 yr (15,475 days)
Aphelion3.0297 AU
Perihelion1.5909 AU
2.3103 AU
Eccentricity0.3114
3.51 yr (1,283 days)
101.49°
0° 16m 50.52s / day
Inclination21.488°
340.44°
244.12°
Physical characteristics
Dimensions8.18 km (calculated)[4]
4.405±0.001 h[5]
4.4106±0.0001 h[6]
0.20 (assumed)[4]
S [4]
12.8[1][4] · 12.81±0.05[5] · 13.27±0.65[7]

    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. "JPL Small-Body Database Browser: 2055 Dvorak (1974 DB)" (2016-07-03 last obs.). Jet Propulsion Laboratory. Retrieved 29 June 2017.
    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. "2055 Dvorak (1974 DB)". Minor Planet Center. Retrieved 29 June 2017.
    4. "LCDB Data for (2055) Dvořák". Asteroid Lightcurve Database (LCDB). Retrieved 29 June 2017.
    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. 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. 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. 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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