(2290) Helffrich
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Asteroid (2290) Helffrich |
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| Properties of the orbit ( animation ) | |
| Orbit type | Outer main belt |
| Major semi-axis | 2.5912 ± 0.0001 AU |
| eccentricity | 0.2343 ± 0.0001 |
| Perihelion - aphelion | 1.9841 ± 0.001 AU - 3.1984 ± 0.0001 AU |
| Inclination of the orbit plane | 11.5519 ± 0.0386 ° |
| Length of the ascending node | 155.8961 ± 0.2243 ° |
| Argument of the periapsis | 270.7645 ± 0.2416 ° |
| Time of passage of the perihelion | December 16, 2018 |
| Sidereal period | 3.78 a ± 0.0839 d |
| Physical Properties | |
| Medium diameter | 17.333 ± 4.372 km |
| Albedo | 0.049 ± 0.019 |
| Absolute brightness | 12.5 mag |
| history | |
| Explorer | Karl Wilhelm Reinmuth |
| Date of discovery | February 14, 1932 |
| Another name | 1932 CD 1 ; 1953 FR; 1976 QR 1 ; 1980 RF |
| 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. | |
(2290) Helffrich ( 1932 CD 1 ; 1953 FR ; 1976 QR 1 ; 1980 RF ) is an asteroid of the outer main belt that was discovered on February 14, 1932 by the German astronomer Karl Wilhelm Reinmuth at the Heidelberg-Königstuhl State Observatory on the western summit of the Königstuhl in Heidelberg ( IAU code 024) was discovered.
designation
(2290) Helffrich was named after the German astronomer Joseph Helffrich (1890–1971), who worked from 1909 to 1911 at the State Observatory in Heidelberg-Königstuhl. As assistant to Max Wolf , after whom the asteroids (827) Wolfiana and (1217) Maximiliana were named, he discovered 13 asteroids. The name was suggested by the German astronomers Gerhard Klare and Lutz D. Schmadel .
See also
Web links
- (2290) Helffrich in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (2290) Helffrich in the Small-Body Database of the Jet Propulsion Laboratory (English).
Individual evidence
- ^ Lutz D. Schmadel : Dictionary of Minor Planet Names . Fifth Revised and Enlarged Edition. Ed .: Lutz D. Schmadel. 5th edition. Springer Verlag , Berlin , Heidelberg 2003, ISBN 978-3-540-29925-7 , pp. 186 (English, 992 pp., Link.springer.com [ONLINE; accessed on July 29, 2019] Original title: Dictionary of Minor Planet Names . First edition: Springer Verlag, Berlin, Heidelberg 1992): “1932 CD1. Discovered 1932 Feb. 14 by K. Reinmuth at Heidelberg ”