(2493) Elmer
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Asteroid (2493) Elmer |
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| Properties of the orbit ( animation ) | |
| Orbit type | Middle main belt |
| Asteroid family | Gefion family |
| Major semi-axis | 2.79 ± 0.00002 AU |
| eccentricity | 0.1689 ± 0.0004 |
| Perihelion - aphelion | 2.3187 ± 0.0001 AU - 3.2613 ± 0.0002 AU |
| Inclination of the orbit plane | 8.7268 ± 0.0455 ° |
| Length of the ascending node | 205.8575 ± 0.2579 ° |
| Argument of the periapsis | 147.7912 ± 0.2878 ° |
| Time of passage of the perihelion | 1st December 2019 |
| Sidereal period | 4.66 a ± 0.1408 d |
| Physical Properties | |
| Medium diameter | 7.401 ± 0.282 km |
| Albedo | 0.322 ± 0.036 |
| Absolute brightness | 12.7 mag |
| Spectral class | SMASSII: S. |
| history | |
| Explorer |
 Richard Eugene McCrosky , Cheng-yuan Shao , G. Schwartz , JH Bulger
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| Date of discovery | December 1, 1978 |
| Another name | 1978 XC ; 1954 QG; 1968 QY |
| 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. | |
(2493) Elmer ( 1978 XC ; 1954 QG ; 1968 QY ) is an approximately seven kilometers large asteroid of the main central belt that was discovered on December 1, 1978 by the American astronomers Richard Eugene McCrosky , Cheng-yuan Shao , G. Schwartz and JH Bulger at Oak Ridge Observatory (then as Agassiz Station part of Harvard College Observatory ) ( IAU code 801). It belongs to the Gefion family, a group of asteroids named after (1272) Gefion .
designation
(2493) Elmer was named after the American astronomer Charles Wesley Elmer (1872–1954), whose meeting with Richard Perkin , after whom the asteroid (2482) Perkin is named, led to the establishment of the company PerkinElmer . As director of the Department of Astronomy at the Brooklyn Academy of Arts and Sciences , he founded the Amateur Astronomers Association in New York City , New York and the Custer Institute in Southold on Long Island , New York.
See also
Web links
- (2493) Elmer in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (2493) Elmer 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 August 14, 2019] Original title: Dictionary of Minor Planet Names . First edition: Springer Verlag, Berlin, Heidelberg 1992): “1978 XC. Discovered 1978 Dec. 1 at the Harvard College Observatory at Harvard. "
| predecessor | asteroid | successor |
|---|---|---|
| (2490) Bussolini | numbering | (2494) Inge |