2004 JG6
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|
| Discovery A (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html) | |
|---|---|
| Discoverer | Brian A. Skiff / LONEOS |
| Discovery date | May 11, 2004 |
| Alternate designations | B (http://cfa-www.harvard.edu/iau/MPDes.html) |
| Category | Aten, Apohele, Mercury-crosser, Venus-crosser |
| Orbital elements C (http://asteroid.lowell.edu/) Epoch October 22, 2004 (JD 2453300.5) | |
| Eccentricity (e) | 0.532 |
| Semi-major axis (a) | 94.985 Gm (0.635 AU) |
| Perihelion (q) | 44.480 Gm (0.297 AU) |
| Aphelion (Q) | 145.491 Gm (0.973 AU) |
| Orbital period (P) | 184.798 d (0.51 a) |
| Mean orbital speed | 34.58 km/s |
| Inclination (i) | 18.962° |
| Longitude of the ascending node (Ω) | 37.076° |
| Argument of perihelion (ω) | 352.935° |
| Mean anomaly (M) | 164.532° |
| Physical characteristics | |
| Dimensions | 0.5-1.2 km |
| Mass | 1.3-18.0×1011 kg |
| Density | 2.0? g/cm³ |
| Surface gravity | 0.0001-0.0003 m/s² |
| Escape velocity | 0.0003-0.0006 km/s |
| Rotation period | ? d |
| Spectral class | ? |
| Absolute magnitude | 19.00 |
| Albedo | 0.10 |
| Mean surface temperature | ~349 K |
2004 JG6 (also written 2004 JG6) is an unusual asteroid.
It is the second known Apohele asteroid, which means its entire orbit lies within that of the Earth. Even more significantly, its orbital period is less than that of Venus or any other known asteroids, 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 also has the smallest aphelion of any known asteroid.
It was discovered by Brian A. Skiff of the LONEOS project.
External link
http://www.lowell.edu/press_room/releases/recent_releases/2004JG6_rls.html
| The minor planets |
| Vulcanoids | Main belt | Groups and families | Near-Earth objects | Jupiter Trojans |
| Centaurs | Trans-Neptunians | Damocloids | Comets | Kuiper belt | Oort cloud |
| (For other objects and regions, see: Binary asteroids, Asteroid moons and the Solar system) |
| (For a complete listing, see: List of asteroids. For pronunciation, see: Pronunciation of asteroid names.) |