(21539) Josefhlávka
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Asteroid (21539) Josefhlávka |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 3.1786 AU |
| eccentricity | 0.0286 |
| Perihelion - aphelion | 3.0877 AU - 3.2695 AU |
| Inclination of the orbit plane | 13.1773 ° |
| Length of the ascending node | 301.2733 ° |
| Argument of the periapsis | 51.7768 ° |
| Sidereal period | 5.67 a |
| Mean orbital velocity | 16.70 km / s |
| Physical Properties | |
| Medium diameter | 12.046 ± 0.133 |
| Albedo | 0.048 |
| Absolute brightness | 13.7 mag |
| history | |
| Explorer | Petr Pravec |
| Date of discovery | August 20, 1998 |
| Another name | 1998 QO 4 |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(21539) Josefhlávka is an asteroid of the main belt that was discovered on August 20, 1998 by the Czech astronomer Petr Pravec at the Ondřejov observatory ( IAU code 557) on Manda Mountain in Ondřejov in the Czech Republic .
The asteroid was named on February 19, 2006 after the Czech architect and patron Josef Hlávka (1831–1908) who, as one of the most prominent contractors of the Vienna Ringstrasse era , built the Lazarist Church and the Palais Erzherzog Wilhelm (Deutschmeisterpalais) in the 1880s founded the Czech Academy of Sciences .
See also
Web links
- Asteroid Josefhlávka: Discovery Circumstances according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics, Cambridge, USA
- (21539) Josefhlávka in the Small-Body Database of the Jet Propulsion Laboratory (English).
- (21539) Josefhlávka in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).