(2684) Douglas
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Asteroid (2684) Douglas |
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| Properties of the orbit ( animation ) | |
| Orbit type | Outer main belt |
| Asteroid family | Eos family |
| Major semi-axis | 3.0482 ± 0.0002 AU |
| eccentricity | 0.046 ± 0.00004 |
| Perihelion - aphelion | 2.908 ± 0.0011 AU - 3.1884 ± 0.0002 AU |
| Inclination of the orbit plane | 9.9215 ± 0.0462 ° |
| Length of the ascending node | 150.7642 ± 0.2488 ° |
| Argument of the periapsis | 112.7636 ± 0.5911 ° |
| Time of passage of the perihelion | April 6, 2020 |
| Sidereal period | 5.32 a ± 0.0162 d |
| Physical Properties | |
| Medium diameter | 15.962 ± 0.255 km |
| Albedo | 0.159 ± 0.008 |
| Absolute brightness | 11.6 mag |
| history | |
| Explorer |
 Norman G. Thomas
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| Date of discovery | 3rd January 1981 |
| Another name | 1981 AD 1 ; 1929 ST; 1939 UF; 1969 UG 2 ; 1978 PM |
| 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. | |
(2684) Douglas ( 1981 AD 1 ; 1929 ST ; 1939 UF ; 1969 UG 2 ; 1978 PM ) is an approximately 10 miles large asteroid of the main outer belt that was discovered on January 3, 1981 by the American astronomer Norman G. Thomas at Lowell Observatory , Anderson Mesa Station ( Anderson Mesa ) near Flagstaff , Arizona ( IAU code 688). It belongs to the Eos family , a group of asteroids named after (221) Eos .
designation
(2684) Douglas was named by the discoverer Norman G. Thomas after his brother Douglas B. Thomas , who was a physicist at the National Institute of Standards and Technology (then: National Bureau of Standards ).
See also
Web links
- (2684) Douglas in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (2684) Douglas 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 September 4, 2019] Original title: Dictionary of Minor Planet Names . First edition: Springer Verlag, Berlin, Heidelberg 1992): “1981 AH 1 . Discovered 1981 Jan. 3 by NG Thomas at Anderson Mesa. "
| predecessor | asteroid | successor |
|---|---|---|
| (2683) Brian | numbering | (2685) Masursky |