(2240) Tsai
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Asteroid (2240) Tsai |
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| Properties of the orbit ( animation ) | |
| Orbit type | Outer main belt |
| Asteroid family | Themis family |
| Major semi-axis | 3.151 AU |
| eccentricity | 0.154 |
| Perihelion - aphelion | 2,667 AU - 3,635 AU |
| Inclination of the orbit plane | 0.842 ° |
| Length of the ascending node | 60.900 ° |
| Argument of the periapsis | 24.586 ° |
| Time of passage of the perihelion | February 16, 2018 |
| Sidereal period | 5.59 a |
| Physical Properties | |
| Medium diameter | 24.395 ± 0.469 km |
| Albedo | 0.057 ± 0.010 |
| Absolute brightness | 11.9 likes |
| history | |
| Explorer | Oak Ridge Observatory |
| Date of discovery | December 30, 1978 |
| Another name | 1978 YA ; 1952 FP; 1966 RH; 1972 TV 1 |
| 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. | |
(2240) Tsai ( 1978 YA ; 1952 FP ; 1966 RH ; 1972 TV 1 ) is a main outer belt asteroid found on December 30, 1978 at the Oak Ridge Observatory of the Harvard-Smithsonian Center for Astrophysicsin in Harvard, Massachusetts ( IAU code 801) was discovered. The asteroid belongs to the Themis family, a group of asteroids named after (24) Themis .
designation
(2240) Tsai was named after the Taiwanese astronomer Tsai Chang-hsien , who was director of the Taipei Upper Vatory from World War II . He was an active observer of planets and variable stars .
Web links
- (2240) Tsai in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (2240) Tsai in the Small-Body Database of the Jet Propulsion Laboratory .
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. 182 (English, 992 pp., Link.springer.com [ONLINE; accessed October 31, 2017] Original title: Dictionary of Minor Planet Names . First edition: Springer Verlag, Berlin, Heidelberg 1992): “Named in honor of Tsai Chang- hsien. "