(2684) Douglas
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 |
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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 |
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(2683) Brian | numbering | (2685) Masursky |