2004 JG6
From Wikipedia, the free encyclopedia
- The correct title of this article is 2004 JG6. It features superscript or subscript characters that are substituted or omitted because of technical limitations.
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Discovery
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|---|---|
| Discovered by | Brian A. Skiff / LONEOS |
| Discovery date | May 11, 2004 |
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Designations
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| Alternative names | none |
| Minor planet category |
Aten, Apohele, Mercury-crosser, Venus-crosser |
| Epoch October 22, 2004 (JD 2453300.5) | |
| Aphelion | 145.491 Gm (0.973 AU) |
| Perihelion | 44.480 Gm (0.297 AU) |
| Semi-major axis | 94.985 Gm (0.635 AU) |
| Eccentricity | 0.532 |
| Orbital period | 184.798 d (0.51 a) |
| Average orbital speed | 34.58 km/s |
| Mean anomaly | 164.532° |
| Inclination | 18.962° |
| Longitude of ascending node | 37.076° |
| Argument of perihelion | 352.935° |
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Physical characteristics
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| Dimensions | 0.5-1.2 km |
| Mass | 1.3-18.0×1011 kg |
| Mean density | 2.0? g/cm³ |
| Equatorial surface gravity | 0.0001-0.0003 m/s² |
| Escape velocity | 0.0003-0.0006 km/s |
| Rotation period | ? d |
| Albedo | 0.10 |
| Temperature | ~349 K |
| Spectral type | ? |
| Absolute magnitude | 19.00 |
2004 JG6 (also written 2004 JG6) is an unusual asteroid.
It is the second known Apohele asteroid (the other being 2003 CP20), which means its entire orbit lies within that of the Earth. Even more significantly, its orbital period is less than that of Venus, making it on average the second-closest known object to the Sun, second only to Mercury. 2004 JG6 has an eccentric orbit that crosses the orbits of both Mercury and Venus.
It was discovered by Brian A. Skiff of the LONEOS project.
[edit] External links
- Orbital simulation from JPL (Java)
- Lowell Observatory (May 20, 2004). "LONEOS Discovers Asteroid with the Smallest Orbit". Press release.
