(21564) Widmanstätten
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Asteroid (21564) Widmanstätten |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 3.0944 AU |
| eccentricity | 0.1848 |
| Perihelion - aphelion | 2.5226 AU - 3.6661 AU |
| Inclination of the orbit plane | 16.8428 ° |
| Length of the ascending node | 164.8845 ° |
| Argument of the periapsis | 213.0631 ° |
| Sidereal period | 5.44 a |
| Physical Properties | |
| Medium diameter | 18.289 ± 0.901 |
| Albedo | 0.058 |
| Absolute brightness | 12.6 mag |
| history | |
| Explorer | Eric Walter Elst |
| Date of discovery | August 26, 1998 |
| Another name | 1998 QQ 101 , 1971 SG 3 , 1987 QY 9 |
| 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. | |
(21564) Widmanstätten is an asteroid of the main belt , which on 26 August 1998 by the Belgian astronomer Eric Walter Elst at the La Silla Observatory ( IAU code 809) of the European Southern Observatory in Chile was discovered.
The asteroid was named on April 2, 2007 after the Austrian scientist Alois von Beckh-Widmanstätten (1754–1849), who created typical structures by etching meteorites with nitric acid . These patterns, known as Widmanstättensche figures , serve as evidence that an iron sample is a meteorite iron.
See also
Web links
- Asteroid Widmanstätten: Discovery Circumstances according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics, Cambridge, USA
- (21564) Widmanstätten in the Small-Body Database of the Jet Propulsion Laboratory (English).
- (21564) Widmanstätten in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).