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]
| Discovery [1] | |
|---|---|
| Discovered by | L. Kohoutek |
| Discovery site | Bergedorf Obs. |
| Discovery date | 19 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 arc | 42.37 yr (15,475 days) |
| Aphelion | 3.0297 AU |
| Perihelion | 1.5909 AU |
| 2.3103 AU | |
| Eccentricity | 0.3114 |
| 3.51 yr (1,283 days) | |
| 101.49° | |
| 0° 16m 50.52s / day | |
| Inclination | 21.488° |
| 340.44° | |
| 244.12° | |
| Physical characteristics | |
| Dimensions | 8.18 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
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
- 2055 Dvořák at AstDyS-2, Asteroids—Dynamic Site
- 2055 Dvořák at the JPL Small-Body Database
