3554 Amun: Difference between revisions
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<!-- Additional parameters for this template are available at [[Template:Infobox Planet]]. -->{{Infobox planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0 | |
<!-- Additional parameters for this template are available at [[Template:Infobox Planet]]. -->{{Infobox planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0 | |
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name=3554 Amun |
name=3554 Amun |
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| image = [[File:Amun Sept 9 2012.PNG|300px]] |
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| caption = Orbit diagram of asteroid Amun with location as of September 9, 2012 |
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| discoverer=[[Carolyn Shoemaker|Carolyn]] and <br> [[Eugene Shoemaker]] |
| discoverer=[[Carolyn Shoemaker|Carolyn]] and <br> [[Eugene Shoemaker]] |
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| discovered=March 4, 1986 |
| discovered=March 4, 1986 |
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Revision as of 16:02, 11 September 2013
 Orbit diagram of asteroid Amun with location as of September 9, 2012 | |
| Discovery | |
|---|---|
| Discovered by | Carolyn and Eugene Shoemaker |
| Discovery date | March 4, 1986 |
| Designations | |
Named after | Amun |
| 1986 EB | |
| Aten asteroid, Venus-crosser asteroid | |
| Orbital characteristics | |
| Epoch July 14, 2004 (JD 2453200.5) | |
| Aphelion | 186.532 Gm (1.247 AU) |
| Perihelion | 104.807 Gm (0.701 AU) |
| 145.669 Gm (0.974 AU) | |
| Eccentricity | 0.281 |
| 350.964 d (0.96 a) | |
Average orbital speed | 29.58 km/s |
| 196.415° | |
| Inclination | 23.363° |
| 358.680° | |
| 359.368° | |
| Physical characteristics | |
| Dimensions | 2.5 ? km |
| Mass | ~1.6×1013 kg |
Mean density | 2 ? g/cm³ |
| ? m/s² | |
| ? km/s | |
| 0.1054 d 1 | |
| Albedo | ? 2 |
| Temperature | ~280 K |
Spectral type | M-type asteroid |
| 15.82 | |
3554 Amun is an M-type Aten asteroid (meaning it crosses Earth's orbit) and a Venus-crosser. It was discovered on 4 March 1986 by Carolyn and Eugene Shoemaker at Mount Palomar Observatory. Its estimated diameter is 2.5 kilometers, making it one of the smallest known M-type asteroids.
Amun was once considered metallic, based on its M-type spectrum. However, like the asteroids 22 Kalliope and 21 Lutetia, the radar albedo of the object is inconsistent with a metallic composition. In Mining the Sky, planetary scientist John S. Lewis calculated the value of 3554 Amun at $20 trillion [1].
(6178) 1986 DA is another M-type near-Earth asteroid with lower inclination that is actually metallic.
Amun passes closest to Venus, and in 1964, 2034, and 2103 comes within 10 Gm of it. [2]
External links
- 3554 Amun at the JPL Small-Body Database
 | This near-Earth asteroid-related article is a stub. You can help Wikipedia by expanding it. |