3554 Amun
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,[1] 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 | 2.48 km[1] |
| Mass | ~1.6×1013 kg |
|
Mean density
|
2 ? g/cm³ |
| ? m/s² | |
| ? km/s | |
| 2.53 hr[1] | |
| Albedo | 0.1284[1] |
| Temperature | ~280 K |
|
Spectral type
|
M-type asteroid |
| 15.82[1] | |
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 2.48 kilometers, making it one of the smallest known M-type asteroids. Amun was the fifth Aten asteroid to be numbered.
Amun was once considered metallic, based on its M-type spectrum. In Mining the Sky, planetary scientist John S. Lewis calculated the value of 3554 Amun at $20 trillion.[2]
(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.[1]
References
External links
<templatestyles src="Asbox/styles.css"></templatestyles>
 |
This near-Earth asteroid-related article is a stub. You can help Wikipedia by expanding it. |
